HKC p771a 7 inch Tablet Root - Android Q&A, Help & Troubleshooting

HKC p771a 7 inch Tablet Root - Android Q&A, Help & Troubleshooting

I have used many different methods to root phones even a few tablets for friends. But I have bought a HKC 7 inch tab from walmart. Great starter tablet by the way. I have found no information what so ever on any forum about this model. It has decent processor power and runs rather smooth. Alas there is no way to root this thing to reach its full potential. I checked around on the net and found nothing, none of the one click apps work on this model. Adb does not recognize the tablet either. I've put in the tablet ID into the adb_usb.ini still no device found. I'm not looking for anyone to just hand me the root process on a silver plater, though that would be nice, but any help moving me in the right direction would be appreciated.

I rooted one of these for a friend at work,
sourceforge.net/projects/androidroot/ is the root that I got to work.
and I've attached the driver that the manufacturer provided me when I requested a driver for development purposes.View attachment Rockusb.rar
Here is how I got it rooted
1. Installed Java JDK and Android SDK.
2. downloaded and extracted Manufacturer driver from Rockusb.rar and right clicked on the .inf file and selected install.
3. Opened Android SDK manager, installed Android SDK for version of tablet, and SDK tools, and Google usb driver from extras.
4. Enabled usb debugging mode on the tablet, and enabled unsigned apps to be installed.
5. Connected the tablet via USB
6. when the tablet shows up in the device manager as P771A I selected to update the driver manually, and selected the google USB driver from the android SDK.
7. Downloaded and extracted the android root I listed above.
8. Run android root and when it says "press any key to continue" it is waiting until the device connects to the computer again, as it could be rebooting, and one time when the tablet reboots, there is no text, just a black screen, but it does eventually connect and you can continue.
Also. I extracted the root to my desktop. when I ran as admin, it did not work, because the files were not on the administrators desktop, only mine, so it might be a good idea to extract the root to C:\ drive, so if you need to use admin, it won't fail
hope this helps
-Brandon

New approach
Ok I cannot get the drivers to install on my computer. Window 7 seems to default to its own driver and will not let me install the rockusb drivers.
With that said, I have the system Update.img and was wandering if the img itself can be rooted and then updated to the tablet. If this is possible and anyone with the knowledge is willing I will upload it. Or if someone is really patient and would like to walk me through the process and I will attempt to do this myself

No Help
So with no help I assume this is dead. I have a usb driver package with an .inf file a .sys file and a .cat file but this will not install on my computer thus leaving without a clue and no help. Have seached for a way to force install this driver command line install right click and install the inf. Nothing works so if someone wants to throw me a bone, thanks, if not I guess this thread is dead.

tannerjames said:
So with no help I assume this is dead. I have a usb driver package with an .inf file a .sys file and a .cat file but this will not install on my computer thus leaving without a clue and no help. Have seached for a way to force install this driver command line install right click and install the inf. Nothing works so if someone wants to throw me a bone, thanks, if not I guess this thread is dead.
Click to expand...
Click to collapse
Can't tell your level of PC knowledge so if you already know this don't get offended. The .inf is editable and there are areas in there that allow manufacturers to prevent installation on some OS's to prevent conflicts. Make a system restore point or better yet a backup and then post the contents of the INF somewhere and point the folks here to it and they may be able to help you edit it to install. Regardless, you'll have to use the "have disk" option instead of letting windows search for a driver even if you get the edits right. And the usual disclaimers about me not being responsible for any issues with your equipment as a result of this are in effect.

tannerjames said:
So with no help I assume this is dead. I have a usb driver package with an .inf file a .sys file and a .cat file but this will not install on my computer thus leaving without a clue and no help. Have seached for a way to force install this driver command line install right click and install the inf. Nothing works so if someone wants to throw me a bone, thanks, if not I guess this thread is dead.
Click to expand...
Click to collapse
I was able to root using the instructions above although i don't think you need the rockusb drivers. You just need the usb drivers that come with the android sdk. I am on Win 7. Thanks for the above info for rooting.
I was able to install ROM manager and now proceeding to backup ROM and upgrade using this guide: cant post link as forum is preventing, but search for rom flash guide on androidpolice com.
Hope this helps.
Big thanks to this thread to get me going...!!!

?
could someone please, Barney style, Explain how I am supposed to select the android_winusb.inf because my steps are as follows. Right click on device p771a in device manager, browse my computer, let me pick from a list of device drivers, have disk, point to the google usb driver (C:/Android/android-sdk/extras/google/usb_driver) select the android_winusb.inf open. Hit ok, (The folder you specified doesn't contain a compatible software driver for you device. If the folder contains a driver, make sure it is designed to work with windows for x64-based systems). Hope this helps explain my troubles. Glad that my thread is helping others to root this device but it does not work for me.

Could it really be that simple?
Found in another forum about the nexus 7 when connected to the pc there is a presistent notification that allows you to change the connection type from mpt to camera which will give you adb access and the tool from this thread works great. Thanks for the help guys, got my root on

tannerjames said:
Found in another forum about the nexus 7 when connected to the pc there is a presistent notification that allows you to change the connection type from mpt to camera which will give you adb access and the tool from this thread works great. Thanks for the help guys, got my root on
Click to expand...
Click to collapse
Glad you could figure it out...
I was not able to use the ROM Manager to backup the ROM since the device is not supported on this tool, but see below for how you can obtain the stock image.
I've tried to flash multiple different ROMs using RKAndroid to the tablet, spending days on this, with no success. The tool itself works great and I am able to flash the ROMs since it supports the RK29 chipset which I believe this tablet has. The stock ROM for this device is available from the manufacturers web site (the link is available when you go to Settings => About Device => System Update, hkcdigital dot com slash update slash update.img), if anyone would like to take the stock rom and upgrade it to Android 4.2/JB.
I was able to unpack/repack the stock image using the wendal image tools and modify / cook the ROM using Android kitchen method described elsewhere in this forum. Rockchip Batch Tool is another great utility to flash custom ROMs to this device. Also, If you put the ROM as update.zip or update.img file on the microSD card, the tablet will take it and flash the image as long as it is in the right format. Ofcourse you can put the tablet into recovery and restore from there as well. I've found that the stock image (update.img) has the following file/folder format when unpacked: /RK29xxLoader(L)_V2.27.bin, /package-file, /parameter, /recover-script, /update-script, /Image/boot.img, /Image/system.img, /Image/recovery.img and /Image/misc.img.
Is it possible to upgrade this tablet to Android 4.2 or atleast Jelly Bean? Would be very helpful if someone is able to do this. The most success I've had so far is with the custom ROM Oma_Odys_Loox_JB_4.1.1_v1.2.2a flashed using RKAndroid. It flashed the tablet fine, updated the boot etc. On tablet boot I am able to see the new logo, but then the it doesn't go anywhere from there. I think customizing this ROM or the stock ROM we should be able to get the new OS on to the HKC tablet. I've given up for now since I don't have the time to spend on this anymore. If someone is able to do this, please post the instructions or upload the custom ROM, as I am sure it will benefit a lot of people and will be much appreciated. Happy cooking!
Thanks!

jawadshaik- rom manager
If you have successfully flashed rom manager on this device could you post the steps you took to do so. What version? Manual flash? The program itself says there is no recovery for this device.

Sorry jumped the gun on that last post. Thanks for the info

What's the secret to keeping the battery from draining so quickly while it's idle? I just got this and see it drained about 40% in about 2 hours I think and I wasn't using it.
tannerjames said:
I have used many different methods to root phones even a few tablets for friends. But I have bought a HKC 7 inch tab from walmart. Great starter tablet by the way. I have found no information what so ever on any forum about this model. It has decent processor power and runs rather smooth. Alas there is no way to root this thing to reach its full potential. I checked around on the net and found nothing, none of the one click apps work on this model. Adb does not recognize the tablet either. I've put in the tablet ID into the adb_usb.ini still no device found. I'm not looking for anyone to just hand me the root process on a silver plater, though that would be nice, but any help moving me in the right direction would be appreciated.
Click to expand...
Click to collapse

@jawadshaik
Just out of curiosity, when you were flashing that Rom that brought up the boot screen, did you do a wipe/factory reset from recovery mode before flashing? I have no idea if that would help or not, but most if not all roms require a data wipe before flashing... Just curious if you had tried this as I have heard of this happening on other devices because a data wipe wasn't done first. Might be worth a shot if you haven't tried it already, just a thought
Sent from my Huawei u8651s using xda app-developers app

Krytical said:
I rooted one of these for a friend at work,
sourceforge.net/projects/androidroot/ is the root that I got to work.
and I've attached the driver that the manufacturer provided me when I requested a driver for development purposes.View attachment 1468367
Here is how I got it rooted
1. Installed Java JDK and Android SDK.
2. downloaded and extracted Manufacturer driver from Rockusb.rar and right clicked on the .inf file and selected install.
3. Opened Android SDK manager, installed Android SDK for version of tablet, and SDK tools, and Google usb driver from extras.
4. Enabled usb debugging mode on the tablet, and enabled unsigned apps to be installed.
5. Connected the tablet via USB
6. when the tablet shows up in the device manager as P771A I selected to update the driver manually, and selected the google USB driver from the android SDK.
7. Downloaded and extracted the android root I listed above.
8. Run android root and when it says "press any key to continue" it is waiting until the device connects to the computer again, as it could be rebooting, and one time when the tablet reboots, there is no text, just a black screen, but it does eventually connect and you can continue.
Also. I extracted the root to my desktop. when I ran as admin, it did not work, because the files were not on the administrators desktop, only mine, so it might be a good idea to extract the root to C:\ drive, so if you need to use admin, it won't fail
hope this helps
-Brandon
Click to expand...
Click to collapse
So after doing working on this a while, I've finally figured it out. Here are some caveats:
1. You can't do this on a Mac or Linux box. Don't ask me why, you just cant.
2. You have to turn on USB debugging, change the Security to allow Unknown sources and MOST IMPORTANT: when you plug it in, you have to change it to "Connected as a Camera". Putting it in storage mode doesn't work!
HOW TO INSTALL THE PROPER DRIVER & ROOT THE DEVICE:
1. Follow the steps quoted above and download the Google Android SDK, and the Java JDK (from oracle.com/java).
2. When you first plug it in (use the USB plug labeled USB not the HOST one), it complains and will discover a P771A device. When it does, right click on your computer, choose Manage my computer, go to the device manager and then right click on the P771A device. Click "Update Device Driver". Choose "Browse my computer for Driver software". Then choose, "Let me pick from a list of drivers on my computer". Browse to the \adt-bundle-windows-x86_64\sdk\extras\google\usb_driver folder which you would have if you had downloaded and installed the Google Android SDK. A list of 3 drivers will appear when you click OK. CHOOSE THE "ANDROID BOOTLOADER INTERFACE" as the driver. None of the others work.
3. Run the root script batch file mentioned above which can be found here at: sourceforge.net/projects/androidroot
4. The root script isn't really great at explaining so I'll try. When you first run it, make sure your device is unlocked and on the home screen.
5. The first thing it will do is reboot your machine. Don't press enter until your machine comes back up.
6. After your machine boots unlock it and then press Enter again. Your machine will reboot. This time it won't seem to come up but the backlight will remain on.
7. Wait about 30-45 seconds then press enter again. You should get: uid=0(root) gid=0(root) in the command prompt window.
8. Press Enter. You should get:
remount succeeded
727 KB/s (22364 bytes in 0.030s)
Removing changes except ROOT...
Installing superuser...
2288 KB/s (843503 bytes in 0.360s)
9. After about 30-60 seconds, your device should reboot. You'll see a box briefly saying "Android is Upgrading" and you'll arrive at the lock screen. Press Enter to exit the command prompt.
Your device is now rooted and you should see "SuperUser" installed. I promptly installed "root uninstaller" to get rid of Facebook, Skype, and Youtube which my little kids don't need access to. This device doesn't have a bootloader or recovery mode so rooting it doesn't get you much besides the ability to uninstall the system software. Have fun.

This may help someone but on step 2 of the guide on the second page, after you right click your device and go to "Let me pick from a list of drivers on my computer". You then click "Show All Devices" then "Have Disk..." Direct it to the root of the adt-bundle folder you downloaded then you can select from the three drivers. I'm on windows 7 32bit and the drivers didn't show up for me like how it was suppose to..

I also could NOT get any of the drivers in the "manufacturer USB" packet to install... I WAS able to install the google drivers, but that also would not allow ADB to see the device... So still stuck with everyone else...

P771A possible problem
I'm having a similar problem where the USB driver downloaded through Android SDK's -> Extras -> Google USB Driver, tells me that the file contains no information about my device. I noticed in the Sources of SDK, there wasn't an API for 4.0.4, only 4.0.3 then 4.1, so i downloaded 4.0.3 repo.
============================================
my devices is on 4.0.4, and my Kernal is as follows:
3.0.8+
[email protected] #8
Wed Aug 29 09:59:19 PDT 2012
Build Number:
P771A-user 4.0.4 IMM76D user.v402.007 release-keys
============================================
I've also made sure weather Unknown Sources is on, as well as USB debugging.
Might the Kernal be the problem? Also, does it matter weather its MTP or CTP?

Now HKC is telling me that they don't support the ability to jail break their devices
Sent from my P771A using xda app-developers app

Related

[HowTo] ADB and USB on the Rhodium

A tutorial for how to get ADB and DroidExplorer up and running for your Rhodium in Windows Vista.
All this information exists in bits and pieces of posts throughout this (and other) forums, though I felt it would be helpful to compile it in one place.
If you’re running a different version of windows, the differences should generally be fairly minor. Please let me know if there’s any mistakes or modifications I should make here.
ADB refers to the Android Debug Bridge, a tool put out by google, which lets you access your android device via the USB connection for the purposes of debugging it. One particularly useful component is the ability to access your phone from your PC via a terminal window (similar to a command prompt). While not necessarily intended for this purpose, it may be used for a rudimentary level of USB access to transfer files to and from your device. It will NOT let you have any of the advanced functions that a native driver would.
Optional First Step: Download ADB from Google:
You may choose to install the SDK yourself, but this will be incorporated in your installation of DroidExplorer in step 4 if you don't already have the SDK installed.
ADB is part of the Android SDK (Software Development Kit), which you can download from:
http://developer.android.com/sdk/index.htmlInstall the most recent version for windows. For simplicity sake, I suggest you extract/install it to the root, so for example, to
C:\android-sdk-windows\
Optional:
To make your life easier, it’s a good idea to add the folder containing adb to your system environment path, so you can use adb from anywhere on your drive.
To do this, right click on My Computer, click ‘Advanced System Settings’, and then click on ‘Environment Variables’.
Choose one of the PATH variables (either for your user, or the system wide one), and add the path containing the adb.exe file. For example, if you extracted the sdk to the root of C drive as I had suggested, the path would be:
[blah blah, preceding path values] ;C:\android-sdk-windows\platform-tools\
Make sure you remember to have a semicolon preceding the path you’re adding, so windows knows it is separate from the previous entry.
Second Step: Remove previous drivers:
If you have tried to connect your phone (in android mode) to your PC, you may need to go to the device manager and remove the incorrectly-installed drivers.
Third Step: Install Drivers:
The key obstacle here is that there is no driver made by HTC (or others) specifically to connect the Rhodium in Android mode to a PC. While there may eventually one day be such a driver, we need to resort to a work-around.
Drivers Option #1:
A product called PDANet installs software on your android phone and your windows PC that then functions as a PC and device driver set. (The application has other intended uses, as you can read on their website, but these are secondary to our purpose).
Download and install the latest version of PDANet, on both your android Rhodium (via marketplace) and your PC (via the below link):
http://www.junefabrics.com/android/index.php
You will then need to follow the prompts to connect your phone, select the manufacturer (HTC), and the HTX XDA Driver will be installed. Windows security may require you to approve the installation, as the driver is unsigned. After installing, you will need to restart your computer before the drivers will work.
As part of the install, you will be asked to connect your RHOD phone to your computer via the USB cable. The new hardware wizard should pop up, and you should choose to install the driver automatically (given that you’ve previously placed the driver onto your system with PDANet – if you’ve managed to locate the specific driver file as I’ve heard rumors of, then browse to that file).
USB Debugging needs to be enabled on your device, which it is in the stock builds provided here (Settings->Applications->Development->USB debugging).
Drivers Option #2:
Install the HTC Sync Drivers - this has been described for Windows 7, although there are mixed reports as to the success. Information is in the below links:
http://forum.xda-developers.com/showpost.php?p=12705726&postcount=7
http://www.mydigitallife.info/workaround-for-htc-hero-sync-problem-in-windows-7/
Optional:
To check that your phone is working, type ‘adb devices’ into your command prompt. If you see your device, you’re good to go. (if you didn’t set the environment path to include the location of adb.exe, you’ll have to either cd to the directory first, or type
C:\android-sdk-windows\platform-tools\adb devices(if you installed the sdk elsewhere, then modify the expression appropriately
What can you do now? To see a list of commands you can use, simply type adb from the command prompt.
To use adb to send a file ‘picture.jpg’ to your sd card, in your command prompt, go to the location of the picture, and then type :
adb push picture.jpg /sdcard/to see the contents of /sdcard , type:
adb shell ls /sdcard/Read more about ADB here: http://developer.android.com/guide/developing/tools/adb.html
And for more details on setting up and using ADB, see this (the source for this workaround):
http://theunlockr.com/2009/10/06/how-to-set-up-adb-usb-drivers-for-android-devices/
--
Fourth Step: Install Droid Explorer
Now that this is working, you may appreciate an application called DroidExplorer, which gives you a GUI that lets you navigate your device in a manner similar to windows explorer. From here, you can copy, move and delete files, as well as install and uninstall applications.
Download and install DroidExplorer from here:
http://de.codeplex.com/
Startup DroidExplorer, and you’re finished. Do read up on ADB and DroidExplorer on their respective pages so that you know both what you can do as well as what you might inadvertently break by blindly playing with options.
As has been said frequently on this website, if you want safe, stick to the default ‘stable’ XDAndroid install for the Rhodium, and keep your windows mobile running as a backup. If you want more, know that you’ll have lots of learning to do, and potentially may loose all the data on your phone and need to spend hours learning and fixing it. You may even brick your phone (make it unusable and unsalvageable – make it about as valuable as a brick).
Helpful Links:
The wiki for ADB on XDAndroid:
http://xdandroid.com/wiki/FAQ#What_is_ADB_.2F_How-To_ADB
Original xda thread on getting USB to work on the rhodium:
http://forum.xda-developers.com/showthread.php?t=849718
If you have any additional comments/changes to suggest, please let me know, and I’ll modify this initial post.

Heh, I always meant to turn that "original XDA thread" into an ADB tutorial for Windows users... but I just never got around to it.
Thanks for putting this together - do you mind if I reference it in the FAQ?
Just skimmed over the how-to - perhaps you should mention that in lieu of the Android SDK, you can simply download Droid Explorer. It usually takes care of the nitty gritty stuff, but pdanet seems to fill in the gaps with driver issues...

I actually found the drivers we needed (XDA in Device Manager)
http://forum.xda-developers.com/showpost.php?p=12705726&postcount=7

AkumaX said:
I actually found the drivers we needed (XDA in Device Manager)
http://forum.xda-developers.com/showpost.php?p=12705726&postcount=7
Click to expand...
Click to collapse
Droid Explorer took care of all the drivers for me on Windows the first time. The second time, PDA.net took care of them for me. I had issues with a ton of different drivers the second time around; even tried wiping them from the system, etc... PDA.net was the only solution that worked for me, as you can see in the linked thread I started.

arrrghhh said:
Droid Explorer took care of all the drivers for me on Windows the first time. The second time, PDA.net took care of them for me. I had issues with a ton of different drivers the second time around; even tried wiping them from the system, etc... PDA.net was the only solution that worked for me, as you can see in the linked thread I started.
Click to expand...
Click to collapse
I installed Droid Explorer and was left w/ 3 (!) Drivers missing, CDC abstract control model ACM x 2, and XDA. After I installed the HTC Sync drivers, it found the driver for XDA and then that gave the ability to let Droid Explorer install the other two *shrugs*

AkumaX, which version of windows did you get the drivers working with? Had you previously tried to install other versions of drivers, or was this 'fresh'? I haven't tried this route (being happy with my PDANet drivers working) - would you say the instructions are good on: http://www.mydigitallife.info/workaround-for-htc-hero-sync-problem-in-windows-7/
arrrghhh, please go ahead and link to this post. I had included the SDK portion because I had mis-read the droidexplorer main page, where the author stated his intent to stop updating the SDK and default to the pre-installed SDK. I see now that he intends to link to the SDK, and thus facilitate its installation for the user. I'll update that in the first post.

slycker said:
AkumaX, which version of windows did you get the drivers working with? Had you previously tried to install other versions of drivers, or was this 'fresh'? I haven't tried this route (being happy with my PDANet drivers working) - would you say the instructions are good on: http://www.mydigitallife.info/workaround-for-htc-hero-sync-problem-in-windows-7/
arrrghhh, please go ahead and link to this post. I had included the SDK portion because I had mis-read the droidexplorer main page, where the author stated his intent to stop updating the SDK and default to the pre-installed SDK. I see now that he intends to link to the SDK, and thus facilitate its installation for the user. I'll update that in the first post.
Click to expand...
Click to collapse
I'm using Win7-64 bit, so I used those drivers. It was a fresh install, and I never even thought to use PDANet, my own searching stumbled upon that thread for the HTC Sync Drivers. It could be better that you install the HTC Sync Drivers before Droid Explorer, but I'd have to find another 'clean' system to try on

AkumaX said:
I'm using Win7-64 bit, so I used those drivers. It was a fresh install, and I never even thought to use PDANet, my own searching stumbled upon that thread for the HTC Sync Drivers. It could be better that you install the HTC Sync Drivers before Droid Explorer, but I'd have to find another 'clean' system to try on
Click to expand...
Click to collapse
That's what VirtualBox is for! lol.

yes i can install usb drivers thank you !

My quest to root my Vizio VTAB108 Tablet and how I enabled ADB access

I am new to the Android platform so please excuse any silliness on my part…
Below are the steps I took to successfully allow my Vizio Tablet (VTAB108) to connect via USB using the generic Google ADB driver as Vizio does not include ADB access for the tablet.
History:
I am trying to Root my tablet and from what I read throughout the forum, the easiest steps to root a tablet is using the SuperOneClick method.
Since SuperOneClick requires ADB access and the Vizio does not include the ADB driver (and the generic Google) do not work out of the box I was at a loss to how I would run SuperOne Click.
This article are the steps I took to get ADB access working with Windows 7 x64 and the Vizio Tablet.
I am hoping my steps here can further lead to root access for this tablet.
As an FYI, I was still unsuccessful in getting SuperOneclick to completely run after following these steps, but maybe someone has an alternate method of rooting now that ADB access is available? /me crosses fingers
It would stop at Step #6 at which time I would disconnect and reconnect the tablet. It would contine to step #8 but then finally fail. If anyone has an alternative to SuperOneClick, I would gladly try it.
IMPORTANT:
The instructions below assume you have already put your Tablet into USB debugging mode.
The instructions below assume you are running Windows 7 x64. If you are running x32 versions of your OS, modify the below settings as apporopriate for your OS[/B].
1. Download and install the Google Android SDK.
(Being this is my first post, I cannot post a URL so google the following topic exactly and click the first link):
what-is-adb-and-how-to-install-it-android
2. When you get to the USB driver install you will have to manually modify your android_winusb.inf settings file to allow Windows to recognize your Vizio Tablet using the generic Google ADB-USB driver.
3. Find the "usb_driver" folder in your sdk directory. (Mine was: C:\Program Files (x86)\Android\android-sdk\extras\google\usb_driver).
4. Right-click "android_winusb.inf" and open it with notepad or your favorite text editor.
Under the [Google.NTamd64] section, paste the following:
Code:
;Vizio Tablet
%SingleAdbInterface% = USB_Install, USB\VID_0489&PID_E040&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_0489&PID_E040&REV_0227&MI_01
then, open a command prompt and type the following:
Code:
echo 0x489 >> "%USERPROFILE%\.android\adb_usb.ini"
5. Right-Click the unknown device in Windows Device Manager (Under Other devices) and manually install the driver for your Tablet.
NOTE: Originally my tablet connected to the computer and installed the regular Windows 7 Mass Storage driver. I had to remove this driver before I could see the device listed under "Other Devices". Follow these instructions if you need to remove your generic Mass Storage driver:
Code:
A. Unplug all removable devices (USB drives, Thumb Drives, SD Cards, Etc...) but leave the Android phone plugged in.
B. Open Windows Device Manager.
C. Select "Universal Serial Bus Controllers"
D. Select USB Mass Storage Device.
IMPORTANT: Click on the details tab and select "Compatible Ids" under the Property drop-down. You should see three items listed under Value. If not, you are looking at the wrong Mass Storage Controller.
E. Select Uninstall Driver
F. Close the window.
G. Right-Click your computer name at the top of device manager and select "Scan for Hardware Changes".
H. Your new "Android Phone USB device" with a Yellow Exlamation mark! will appear under Other Devices.
I. Click on the "Android Phone USB device"
J. Select "Update driver software"
J. Select "Browse my computer for driver doftware"
K. Browse for the location that you have unzipped the android_usb_windows ( Mine is: C:\Program Files (x86)\Android\android-sdk\extras\google\usb_driver )
6. Now test to make sure you can access your device in USB Debug mode:
Type the following from a command prompt:
adb kill-server
adb devices
You should see your device serial number at the command prompt and in Windows Device Manager if everything worked.

drivers
USB Drivers have been posted on the vizio support website for Intel and for AMD. Are they crucial to what you want to do about rooting?

USB Drivers Not Installing
[email protected] said:
USB Drivers have been posted on the vizio support website for Intel and for AMD. Are they crucial to what you want to do about rooting?
Click to expand...
Click to collapse
I grabbed those drivers a couple of days ago and could not get Win7 or WinXP to install them with the vtab1008.
I can use adb to interface with the vtab008 (using Linux and Win7), but GingerBreak and SimpleOneClick (which uses GingerBreak) are unable to root the vtab1008.

I've been pestering Vizio about the downsides of the tablet. Coming from a rooted Nook, there are some things about the vizio i really like. It's a nice build at an attractive cost. If I can get netflix and hbo go working, a better remote app and a more logical system of using the sd card, I would keep it. Otherwise it goes back to Costco on the 89th day after purchase.

Agreed
[email protected] said:
I've been pestering Vizio about the downsides of the tablet. Coming from a rooted Nook, there are some things about the vizio i really like. It's a nice build at an attractive cost. If I can get netflix and hbo go working, a better remote app and a more logical system of using the sd card, I would keep it. Otherwise it goes back to Costco on the 89th day after purchase.
Click to expand...
Click to collapse
This is my thinking EXACTLY!

[email protected] said:
I've been pestering Vizio about the downsides of the tablet. Coming from a rooted Nook, there are some things about the vizio i really like. It's a nice build at an attractive cost. If I can get netflix and hbo go working, a better remote app and a more logical system of using the sd card, I would keep it. Otherwise it goes back to Costco on the 89th day after purchase.
Click to expand...
Click to collapse
Yes, I agree. If there's no root, the tablet is not worth it.

The drivers worked for me.

I downloaded the drivers from the Vizio site and when I plugged the VTAB into my computer I manually installed the driver. I just used adb to grab a bunch of screenshots.

OP worked for me (without the mass storage issue)
Code:
adb reboot bootloader
just did a true reboot
Code:
adb reboot recovery
got me the exclamation mark and the "Home" button brought me to a recovery screen where it would let me flash signed updates or cache/full wipe the device.

You can get to recovery mode by holding down both volume buttons and the power button. Details

I cant even get the drivers to install. I've did a right click on the .inf file and it will not install. Any Ideas?
Thanks
Mark

Mark0266 said:
I cant even get the drivers to install. I've did a right click on the .inf file and it will not install. Any Ideas?
Thanks
Mark
Click to expand...
Click to collapse
DL the drivers from the Vizio site. Turn on USB debugging on the VTAB. Plug the VTAB into your computer. When the install driver prompt comes up follow the steps to install a driver from a specific location and point it to the driver you downloaded. The steps will vary depending on the version of windows you are running.

marvin02 said:
DL the drivers from the Vizio site. Turn on USB debugging on the VTAB. Plug the VTAB into your computer. When the install driver prompt comes up follow the steps to install a driver from a specific location and point it to the driver you downloaded. The steps will vary depending on the version of windows you are running.
Click to expand...
Click to collapse
Thats the problem the prompt never comes up. Running Windows 7

Well I got the driver for adb to install but it still will not show up when I do adb devices

Bootloader?
the.joeba said:
OP worked for me (without the mass storage issue)
Code:
adb reboot bootloader
just did a true reboot
Code:
adb reboot recovery
got me the exclamation mark and the "Home" button brought me to a recovery screen where it would let me flash signed updates or cache/full wipe the device.
Click to expand...
Click to collapse
Did you actually get into the bootloader? adb reboot bootloader simply reboots the device for me.

So whats with gingerbreak? No love with it? I thought this thing was rooted already prior to shipping? Hmmm. My bro just ordered one for me and I am curious about getting it rooted. Lets get this thing rooted and overclocked and get it some love. Also, whats the word on honeycomb on this beast? anything?....

Mark0266 said:
Well I got the driver for adb to install but it still will not show up when I do adb devices
Click to expand...
Click to collapse
Same here.

Rooting help
I have some coding knowledge, but have never worked on rooting a device. I did not pay for mine, so if anyone has references to some info I can look at about obtaining root then I will work on mine without fear of bricking it.

I have been at this for weeks, to no avail.. tried changing params in Gingerbreak, tried running it under every condition possible, and the only thing I haven't tried is changing how GingerBreak is using the /sdcard/ mount point, as that's where the internal memory is mounted to.. It's a pretty odd move to make, and I don't like having my true sdcard in /sdcard/external. what a crock :/

This tablet has to have a way to be rooted, I tried an older version of gingerbreak 1.1 just kept running, never failed, but didn't root the tablet just kept running, like it was gonna root the tablet, kinda weird, I do know that the bootloader is not locked down, my wife works for vizio, the company gave there employees a tablet for free

Official "How To" root Lenovo Tab S8-50

Its finally here guys, the moment you've been waiting for, ROOT for the Lenovo Tab S8-50. To Root Your Device, All you have to do is enable developer options/mode by tapping on your build number multiple times. Then navigate to Developer Options and make sure you enable USB Debugging or else your PC wont recognize the tablet. Make sure that you have Installed the proper ADB drivers for your device and its Drivers.
Requirements and conditions:
1-Make sure that your computer is not connected to other Android devices
2-Make sure that you have installed the ADB drivers for S8-50 tablet
3-Make sure that the machine is turned on USB debugging
4-Connect the device to your computer via USB
5-Download the below attached file, extract it, and run the program
6-If all the conditions and requirements are met, after working program closes automatically, the device will reboot automatically and will appear on the unit program SuperSU .
Download Links will be provided at the end of this post ! I/we are not responsible for any harm or damage done to your device during the process of rooting it. If it fails and bricks, that's your fault. I've successfully rooted mine and it was easy.
If you get an error during the rooting process that said "adb server is out of date killing adb server didn't ack" or something like that, there is a way to fix it. Open Task Manager on your PC and try closing adb.exe and restarting it, or just Google the error and you will most likely find a way.
All Credit Goes to its Respectful Owner "Xakep" From Lenovo-Forums.ru.
Requires 7-zip to open or WinRar

Added English version manual on Lenovo-Forums.ru

Hash.H said:
Its finally here guys, the moment you've been waiting for, ROOT for the Lenovo Tab S8-50. To Root Your Device, All you have to do is enable developer options/mode by tapping on your build number multiple times. Then navigate to Developer Options and make sure you enable USB Debugging or else your PC wont recognize the tablet. Make sure that you have Installed the proper ADB drivers for your device and its Drivers.
Requirements and conditions:
1-Make sure that your computer is not connected to other Android devices
2-Make sure that you have installed the ADB drivers for S8-50 tablet
3-Make sure that the machine is turned on USB debugging
4-Connect the device to your computer via USB
5-Download the below attached file, extract it, and run the program
6-If all the conditions and requirements are met, after working program closes automatically, the device will reboot automatically and will appear on the unit program SuperSU .
Download Links will be provided at the end of this post ! I/we are not responsible for any harm or damage done to your device during the process of rooting it. If it fails and bricks, that's your fault. I've successfully rooted mine and it was easy.
If you get an error during the rooting process that said "adb server is out of date killing adb server didn't ack" or something like that, there is a way to fix it. Open Task Manager on your PC and try closing adb.exe and restarting it, or just Google the error and you will most likely find a way.
All Credit Goes to its Respectful Owner "Xakep" From Lenovo-Forums.ru.
Requires 7-zip to open or WinRar
Click to expand...
Click to collapse
Do this root apply to the s8-50F ?
EDIT: This method indeed does work on the S8-50F variant. Was having problems with device staying in adb while running program, but a reboot of pc fixed that and gained root effortlessly. THanks!

Glad It Helped !!!

Hash.H said:
Its finally here guys, the moment you've been waiting for, ROOT for the Lenovo Tab S8-50. To Root Your Device, All you have to do is enable developer options/mode by tapping on your build number multiple times. Then navigate to Developer Options and make sure you enable USB Debugging or else your PC wont recognize the tablet. Make sure that you have Installed the proper ADB drivers for your device and its Drivers.
Requirements and conditions:
1-Make sure that your computer is not connected to other Android devices
2-Make sure that you have installed the ADB drivers for S8-50 tablet
3-Make sure that the machine is turned on USB debugging
4-Connect the device to your computer via USB
5-Download the below attached file, extract it, and run the program
6-If all the conditions and requirements are met, after working program closes automatically, the device will reboot automatically and will appear on the unit program SuperSU .
Download Links will be provided at the end of this post ! I/we are not responsible for any harm or damage done to your device during the process of rooting it. If it fails and bricks, that's your fault. I've successfully rooted mine and it was easy.
If you get an error during the rooting process that said "adb server is out of date killing adb server didn't ack" or something like that, there is a way to fix it. Open Task Manager on your PC and try closing adb.exe and restarting it, or just Google the error and you will most likely find a way.
All Credit Goes to its Respectful Owner "Xakep" From Lenovo-Forums.ru.
Requires 7-zip to open or WinRar
Click to expand...
Click to collapse
The download isn't working for me. It's not downloading as a zip? Any suggestions?

If youre using windows, download a program called 7-zip and downoad the file. right click the root software and click extract here. or open with 7-zip. You could also use winrar. The format of the file is in .7z right ? that means search up http://www.7-zip.org/

Any idea how to unroot?

Not sure. Have you tried the full unroot method in the su app?

__McB__ said:
Any idea how to unroot?
Click to expand...
Click to collapse
SuperSU.apk.....in the setting, unroot, cleanup...

icanttinkofaname said:
Not sure. Have you tried the full unroot method in the su app?
Click to expand...
Click to collapse
jazzespresso said:
SuperSU.apk.....in the setting, unroot, cleanup...
Click to expand...
Click to collapse
Thanks both of you. I ended up returning it, root and all, but I'm sure your suggestion would have worked.

After rooting, has there been anything anybody's been able to do about battery life? I don't imagine there's been any Roms built for this device yet, but didn't know if maybe someone's figured out something that's helped extend their battery life, because when playing certain games like clash of clans for instance, I'm lucky to get an hour and a half of game play, and that's with my brightness turned all the way down. Any suggestions would be greatly appreciated. Thanks
Sent from my Lenovo TAB S8-50F using XDA Free mobile app

This root guide works on s8-50f! thanks Xakep
This is a very easy and usefull root instruction, i rooted my tab s8-50f with no problems.
I followed the steps described and got instant root without any issues.
My machin is windows pc with windows 8.1 pro 32bit. Plug your tab and windows recognized the drivers just make sure your device mngr shows lenovo s850 and you are all set. Then just run the flash tool and it will run in less than a minute your tablet will reboot and your tab will be rooted.

Yes this is probably the easiest I've ever rooted any device in the past. If at first it doesn't take, don't worry it will. Just repeat the process till it does. Thanks Hash.h for putting up this thread and passing along the info
Sent from my Lenovo TAB S8-50F using XDA Free mobile app

Where can I download the ADB drivers for S8-50 from?

I think drivers come with tablet. Try to connect the tablet and it will show CD drive on which is the driver.

error: device offline?
I followed this with no luck. I have adb installed and running "adb devices" shows the tab connected, but when I run the tool "error: device offline" scrolls repeatedly and no root.
Any suggestions?
Thanks

Worked great. Thank you.
Awesome little tablet.

Jirbo said:
I followed this with no luck. I have adb installed and running "adb devices" shows the tab connected, but when I run the tool "error: device offline" scrolls repeatedly and no root.
Any suggestions?
Thanks
Click to expand...
Click to collapse
Tried on another computer and succeeded.

This worked brilliantly...
but then I upgraded my firmware using the in-built system and it de-rooted. Now the exe no longer works.
New firmware is S8-50F_S000200_150121_ROW
Exe -appears- to run well, but appears to fail on the last command. Unfortunately it disappears off the screen before I can check the exact nature of the error. It appears to go fine until the final attempt to copy the SU binary into place fails with a 'File not found' error.
I've also tried the other method here:
http://forum.xda-developers.com/general/rooting-roms/guide-lenovo-s850-row-t2927400
The flashtool fails to find the device (I know the drivers are installed), so I'm unable to install the new boot image.
ADB shell fails
mount -o remount,rw /system
with the response
mount: Operation not permitted
so none of the 'push' operations will complete as the /system folder is read-only.
Any suggestions?

moogthedog said:
This worked brilliantly...
but then I upgraded my firmware using the in-built system and it de-rooted. Now the exe no longer works.
New firmware is S8-50F_S000200_150121_ROW
Exe -appears- to run well, but appears to fail on the last command. Unfortunately it disappears off the screen before I can check the exact nature of the error. It appears to go fine until the final attempt to copy the SU binary into place fails with a 'File not found' error.
I've also tried the other method here:
http://forum.xda-developers.com/general/rooting-roms/guide-lenovo-s850-row-t2927400
The flashtool fails to find the device (I know the drivers are installed), so I'm unable to install the new boot image.
ADB shell fails
mount -o remount,rw /system
with the response
mount: Operation not permitted
so none of the 'push' operations will complete as the /system folder is read-only.
Any suggestions?
Click to expand...
Click to collapse
Same problem here. Lost root after the last update and now I can't get either root method to work.

[Q] Lockscreen Reset Trio (generic crap) tablet. NO debugging.

Almighty! lets get started,
I have a 64 bit computer running Windows 7 professional.
First let me mention I tried to fix this on my own. darn I tried.
Just plugging the tablet into computer shows a windows explorer page named Autoplay that let me view pictures on device on a folder named
Computer\Trio HD Elite 7.85 Tablet
Installed android-studio-bundle-141.1903250-windows in
Error- SDK required.
Downloaded jdk-7u79-windows-x64 (java development kit)-install reboot PC
Open C:\Andriod in windows explorer, open SDK Manager
A command prompt window flashes briefly, then closes.
click start, search for run key in sysdm.cpl go to advanced, environment variables create new path named JAVA_HOME that does directly to the java .exe file
(this was checked by reinstalling the java development kit, then opening Java typing where java it tells me C:\Windows\System 32 even though the path is
C:\Program Files\Java\jdk1.7.0_79
opening ADB works!
Download Extras- Android USB Driver
open CMD key in
cd C:\Andriod\platform-tools
this brings me to the directory where Android ADB is.
abd devices
no devices detected.
Installed Samsung Kiles.
TRIED to install PDAnet.. failure.
tried to open Device manager, where a entry marked Trio HD Elite 7.85 Tablet sits, and update the driver to the C:\Andriod\extras\google\usb_driver
it complains about driver being unsigned. Using This guide I used step Two downloaded Driver Signature Enforcement Overrider (DSEO) and ran it.
went into the C:\Andriod\extras\google\usb_driver folder and manually keyed in every title in the folder.
each time program stated had signed successfully. The computer is now saying test mode in the bottom right hand corner. however trying to update driver gives same error.
I'm amusing the device needs to be in developer mode, which it cant be put into because it's locked.
The Trio Support is useless there steps do not open any settings. Also tried a list of alternate ways to open tablet recovery. and since ADB isn't reconizing the device I can't run adb reboot recovery
So. end result, im here with coffee and no milk,
A generic tablet cobbled together from who knows where,
and a locked screen.
Think you can help?
ANY assistance is appreciated.
So i have a cheap generic tablet that says Trio Stealth G4X 7.85

Root for HAOQIN H7 PRO

Hi everyone, I recently purchased a tablet on Amazon, which is slowly gaining a lot of fame for its really affordable price .Unfortunately I was unable to find information on the specific rooting procedure for this device. I hope someone knows how to recommend a way to solve the problem, thanks to everyone anyway
PS: I have already tried several OneClickRoot applications like Kingo Root, KingRoot, Framaroot and 360 Root.
Tablet information:
Tablet name : H7 pro
Brand name : Haoqin
Device model : H7_EEA
Android version : 9
Android security patch level : August 5, 2019
Kernel version : 4.4.189
Build number : Winnovo_H7_V1.7_20200406

nubrox99 said:
Hi everyone, I recently purchased a tablet on Amazon, which is slowly gaining a lot
...
Kernel version : 4.4.189
Build number : Winnovo_H7_V1.7_20200406
Click to expand...
Click to collapse
Hi,
Unfortunately I didn't even found the firmware file for your tablet so I doubt someone will be able to root it successfully without those files.
Have a good day

nubrox99 said:
PS: I have already tried several OneClickRoot applications like Kingo Root, KingRoot, Framaroot and 360 Root.
Click to expand...
Click to collapse
My POV: Those so-called One-Click-Rooters all are crap. Most of them are heavily outdated, not applicable on devices with newer versions of Android as with Android 9 GO what is installed on your device. For example KingRoot you tried only may work on devices with Android versions up to version 5 & Framaroot you also tried only may work on device's with Android version less then Pie.
And worst: They may even inject trackers as it's reported in WEB.
In short: You have to root your device's Android manually by yourself, of course only if supported by OEM/Carrier. To verify this boot into device's Recovery and look for option "apply update from adb".
If NOT present then simply stop further reading.
How-To:
In Android's Settings->Developer options enable "USB debugging"
Install ADB-driver on your computer and make it systemwide accessible, means add its location to PATH environment variable and re-boot computer
Download SuperSU Pro
Rename the downloaded ZIP-file to update.zip and move it to folder where ADB-driver is housed
Make sure your Android is charged over 60%
Connect your Android device with computer via USB-cable
On computer open command prompt: [Win]+[R], input cmd and press Enter-key
Run commands - one by one
Code:
adb devices
adb reboot recovery
Don't close command prompt window!
In Android's Recovery menu select option " apply update from adb" and confirm by pressing power button
On computer run command
Code:
adb sideload update.zip
The zip.file will be sideloaded and written in your Android. The process will take quite a long time, so please enjoy yourself with something during the period. When it completes, you can see something like "Install from ADB complete" on the screen.
As last step on computer run command
Code:
adb reboot
Close command prompt window
You also may delete file update.zip: it's no longer needed
I hope I've made it clear to you.

jwoegerbauer said:
Code:
adb sideload update.zip
Click to expand...
Click to collapse
Hi jwoegerbauer , thank you very much for your timely and detailed reply, sorry if I did not answer immediately.I tried with your suggestions, but when I do this step, it gives me an unrecognized device error (in fact the adb devices command give me an empty list) .Checking on google, I noticed that it is a driver problem and then the phone is not recognized in recovery mode but, always on google I was unable to find a guide to solve the problem. On the android developer site I downloaded a file zip called "usb-driver", but when I update the drivers and set this folder as a directory it gives me this error: "The specified folder does not contain a software driver compatible with the device. if there is a driver in the folder, make sure it is designed to work with windows for x64 systems "
I hope it is not my mistake or that it is something resolvable anyway, I wait and trust in your further clarification if possible

@nubrox99
The driver package usb_driver_r12_windows.zip you downloaded isn't the expected one, it's only meant to be explicitely used with Google devices. Typically the USB-driver gets downloaded from OEM's/Carrier's website. If not provided by them, then the Universal ADB Driver should get installed.

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