Hello everyone,
I have a lenovo P8 Tab 3 with the lineageOS 14.1 rom of highwaystar_ru and I needed to make a change in the kernel, can anyone help me?
I will use the tablet in the car and I need to have the power on as well as the easycap by usb for the reversing camera
With the otg cable I can have both things working, but the problem is that as soon as I turn off the car and the tablet runs out of power when I reconnect it it detects the easycap and does not sense the power, forced to remove the cable and reconnect to re-energize
I tried a thousand and one things without success, already tried to change the kernel itself but I end up having many errors because I'm not sure what I'm doing
thank you so much
if anyone can help me I'm willing to make a donation, thanks
USB HOST
Frusciantism said:
Hello everyone,
I have a lenovo P8 Tab 3 with the lineageOS 14.1 rom of highwaystar_ru and I needed to make a change in the kernel, can anyone help me?
I will use the tablet in the car and I need to have the power on as well as the easycap by usb for the reversing camera
With the otg cable I can have both things working, but the problem is that as soon as I turn off the car and the tablet runs out of power when I reconnect it it detects the easycap and does not sense the power, forced to remove the cable and reconnect to re-energize
I tried a thousand and one things without success, already tried to change the kernel itself but I end up having many errors because I'm not sure what I'm doing
thank you so much
Click to expand...
Click to collapse
Hi there,
I'm not sure what the problem is I think it might be the camera or maybe lack of power.
However it might not be the Kernal. The camera might be using higher power than that the tablet is giving out which might explain the power problem yet I am not sure.
Hi, thanks for the reply. From what I have researched the problem is not this.
What I need is the simultaneous charging + OTG connectivity tablet, something like Nexus 7 is possible with the version of the kernel timurs
up
Frusciantism said:
up
Click to expand...
Click to collapse
Hi there,
So a power problem as I suspected
Related
Hi All,
I have a U25GT-C4W running Android 4.4.2 KitKat. I have managed to root the tablet.
The tablet has a separate charging DC 5V in jack as well as a USB Micro OTG connector. It connects to PC fine and I am able to detect it through adb.
It is also able to detect OTG devices connected to it such as a Keyboard, Mouse and a USB Stick/Flash Drive.
Out of all the China tablet clones that I have tested, this one has a peculiar behavior. See picture attached to understand this behavior.
If I connect DC 5V plug to tablet, tablet starts charging.
Then when I connect a USB Mouse, the tablet STOPS charging after 5 seconds (Not normal behavior).
Then when I remove the USB Mouse, tablet starts charging again (after 10 seconds).
I have tested other tablets with separate DC 5V jack and they do not show this behavior. This is not normal.
Tablets I have tested:
ValuePad VP112
King's Hong Kong H704A
When these above tablets are charging with DC 5V, and then I connect USB Mouse, these tablets do not stop charging like the Cube U25GT is doing.
Has anyone else experienced this type of issue? Has anyone solved it? Are there any custom kernels/system that I could use for this to solve the problem? I don't usually post questions on the forum because I usually find the answers I need after searching for a while, but this has been a baffling situation.
Hopefully someone will answer. Let me know if you have any questions about my issue.
Thanks.
hulp us please
I have the same tablet, and have same problem.
I need to solve this problem, because its important for me.
i use this tablet as a part of multimedia system in my car.
so i cant plug any device via otg to tablet
Please help us...
Sorry for my bad English
Go for another tablet.
Hi,
The short version is: No. I couldn't solve the problem.
I spent about 2 to 3 weeks trying to solve this issue. I started from garnering information on kernel sources for the MTK tablets (the SoC which the Cube tablet is based on), trying to find the source code for it, compiling it and flashing it to the tablet. I tried contacting the people at cube-tablet.com. I spent a lot of time explaining them the problem hoping they would give me some indication as to why this was not working. I spent a lot of time contacting people in various forums who had some exposure to the Cube tablet. But that proved fruitless as well.
In the end, I just gave up. We just experimented with a various other tablets and settled with one that charged as well as worked with OTG.
Thanks.
ahmedow said:
I have the same tablet, and have same problem.
I need to solve this problem, because its important for me.
i use this tablet as a part of multimedia system in my car.
so i cant plug any device via otg to tablet
Please help us...
Sorry for my bad English
Click to expand...
Click to collapse
2904
wickedmask said:
Hi,
The short version is: No. I couldn't solve the problem.
I spent about 2 to 3 weeks trying to solve this issue. I started from garnering information on kernel sources for the MTK tablets (the SoC which the Cube tablet is based on), trying to find the source code for it, compiling it and flashing it to the tablet. I tried contacting the people at cube-tablet.com. I spent a lot of time explaining them the problem hoping they would give me some indication as to why this was not working. I spent a lot of time contacting people in various forums who had some exposure to the Cube tablet. But that proved fruitless as well.
In the end, I just gave up. We just experimented with a various other tablets and settled with one that charged as well as worked with OTG.
Thanks.
Click to expand...
Click to collapse
Thanks a lot for your answer wickedmask.
It was disappointing for me. The whole project was built on this tablet by me.
You can see from the photos below:
There's an interesting variable in build.prop:
# USB Charge only function
ro.sys.usb.charging.only=yes
Have you tried to change it to "no"?
ckom26 said:
There's an interesting variable in build.prop:
# USB Charge only function
ro.sys.usb.charging.only=yes
Have you tried to change it to "no"?
Click to expand...
Click to collapse
I changed it to "no", but nothing has changed. Still same
Hello. Today I have made terrible mistake when trying to turn on a device in my pc. I have changed the voltage from my source power and my pc has exploded. Luckly, only the power supply has exploded in fact, like all other things are working and I'm typing this now on my pc. However the integrated sound card from my motherboard have stop working, don't get recognized even when I try to uninstall and re-install. I think it have damaged...
Well, this sucks, but while I don't spend a few bucks trying to get a cheap off-board sound card, I was thinking if there are any way to make a android device sounds like a USB offboard sound card. I have searched in web and XDA for a answer, but always I get the solution using wifi. I already get this working, but has a small lag, and this is uncomfortable. Others resolutions always use some kind of kernel change or/and OTG support with the device.
TLDR: Now, this is my question: Someone has managed to send the audio from the PC via USB for a android in a device (like a off-board USB sound card), and this could be possible without kernel changes or OTG? (My Moto E don't support OTG, unfortunately)
PS: Sorry for the long post, I just wanted to share my unlucky story.
Hi,
I'm looking for a solution to this problem: I have an ASUS Google Nexus 7 which I mishandled and broke the screen + digitiser to the point where there is absolutely no touch response - The screen however IS still visible. This happened several months ago. I've been searching for ways to retrieve the data on the tablet, but all to no avail.
Here's the case:
-The USB port is fine;
-The tablet is not rooted and never has been;
-USB debugging is not on;
-The tablet is on PTP, not MTP;
-I do have the device driver installed on my PC;
-I'm only looking for the media from the device - none of the apps or app data;
Is there any hope of getting back the media left on the tablet, or will I have to purchase a new digitiser and screen + bezel? I know how it all goes together so it wouldn't be a problem if I had to get a replacement, but I would prefer to do it cost-free if possible.
If anyone can help me out here, it'll be greatly appreciated!
Thanks in advance.
MrsAverageMan said:
Hi,
I'm looking for a solution to this problem: I have an ASUS Google Nexus 7 which I mishandled and broke the screen + digitiser to the point where there is absolutely no touch response - The screen however IS still visible. This happened several months ago. I've been searching for ways to retrieve the data on the tablet, but all to no avail.
Here's the case:
-The USB port is fine;
-The tablet is not rooted and never has been;
-USB debugging is not on;
-The tablet is on PTP, not MTP;
-I do have the device driver installed on my PC;
-I'm only looking for the media from the device - none of the apps or app data;
Is there any hope of getting back the media left on the tablet, or will I have to purchase a new digitiser and screen + bezel? I know how it all goes together so it wouldn't be a problem if I had to get a replacement, but I would prefer to do it cost-free if possible.
If anyone can help me out here, it'll be greatly appreciated!
Thanks in advance.
Click to expand...
Click to collapse
Have you connected it to PC to see what is available to view? I'm afraid that being set to PTP may hinder your data recovery efforts.
Evolution_Tech said:
Have you connected it to PC to see what is available to view? I'm afraid that being set to PTP may hinder your data recovery efforts.
Click to expand...
Click to collapse
Yeah, that's why I mentioned it. If it was on MTP (which it should've been ) then this whole situation would've been a lot easier. Unfortunately, because of the broken digitiser, I can't change it either. If i can get remote access to the screen everything should be okay in theory (after I've put the screen back on)
MrsAverageMan said:
Yeah, that's why I mentioned it. If it was on MTP (which it should've been ) then this whole situation would've been a lot easier. Unfortunately, because of the broken digitiser, I can't change it either. If i can get remote access to the screen everything should be okay in theory (after I've put the screen back on)
Click to expand...
Click to collapse
Can you use a mouse with an OTG cable?
Sent from my One M8 using Tapatalk
Evolution_Tech said:
Have you connected it to PC to see what is available to view? I'm afraid that being set to PTP may hinder your data recovery efforts.
Click to expand...
Click to collapse
The Fer-Shiz-Nizzle said:
Can you use a mouse with an OTG cable?
Click to expand...
Click to collapse
That was one of my initial thoughts, but I was unsure of whether the old-gen Nexus 7 supported OTG and whether you had to have to have a rooted device for OTG. I'm gonna presume you don't need a rooted device for OTG and that my Nexus 7 should work just fine with it since I've had that suggested here, and on Tom's Hardware.
MrsAverageMan said:
That was one of my initial thoughts, but I was unsure of whether the old-gen Nexus 7 supported OTG and whether you had to have to have a rooted device for OTG. I'm gonna presume you don't need a rooted device for OTG and that my Nexus 7 should work just fine with it since I've had that suggested here, and on Tom's Hardware.
Click to expand...
Click to collapse
I have a 2012 Nexus 7 (Grouper). It supports OTG. Good luck
Sent from my One M8 using Tapatalk
Supported list (GA models. Says 4.2, but same for 4.4.4 iirc)
http://i.sbo2.com/page/GA Series Android 4.2 Manual_EN.html
You may need to change/add apn settings. Install this app to get to the settings: https://play.google.com/store/apps/details?id=diewland.settings.mobilenetworks&hl=en
I use this one: http://www.eonon.com/Others/Others/V0049.html (is cheaper on ebay)
Also make sure that the cable is connected firmly to the back of the headunit
Useful information:
http://forum.xda-developers.com/showpost.php?p=58854199&postcount=8715
Could someone direct me to where the support list is found? The top link doesn't work. Just wondering if there has been any additions.
I'd like to have 4g ideally, is this even possible with these units (I own a huifei)? Can pick up a huawei e3372 for £15 on eBay
Sent from my GT-I9505 using Tapatalk
Any tried and tested USB wifi dongle as sometimes my units WIFI doesnt turn on, I am hoping I can just add an external USB WIFI dongle to the OTG USB adapter and use that one that way ????
mikejclark said:
Could someone direct me to where the support list is found? The top link doesn't work. Just wondering if there has been any additions.
I'd like to have 4g ideally, is this even possible with these units (I own a huifei)? Can pick up a huawei e3372 for £15 on eBay
Sent from my GT-I9505 using Tapatalk
Click to expand...
Click to collapse
I have a e3372, but I can't make it work..... not an expert either.... but when I plug it in nothing happens. But it works great in my pc
These two work well together on the Head Unit.
http://www.amazon.co.uk/gp/product/...ue&ref_=ox_sc_act_title_1&smid=A1WCLLO809O2M2
http://www.amazon.co.uk/gp/product/B00I4UQ0AC?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00
I whait my unit tomorrow. Can anyone tell is only the listed usb 3g sticks working?
Στάλθηκε από το ONE A2003 μου χρησιμοποιώντας Tapatalk
Only what you see in this post as far as I can tell.....
maximosm said:
I whait my unit tomorrow. Can anyone tell is only the listed usb 3g sticks working?
Στάλθηκε από το ONE A2003 μου χρησιμοποιώντας Tapatalk
Click to expand...
Click to collapse
You can get other USB broadband modems working if you use the PPP Widget 2 app (https://play.google.com/store/apps/details?id=de.draisberghof.pppwidget2&hl=en). I found it to be pretty annoying though so I came up with an alternative solution.
I now use a TMobile Z915 mobile hotspot. I plan to install a switch to the battery so I can still use it when travelling, but I can otherwise leave it installed in the car and have it powered by the radio. When the car is turned off, it should kill the power to the hotspot. When power is restored it will power up and have instant wifi.
I'm tempted to try my 4G USB broadband modem again just to see if it works now that I've installed the Malaysk ROM. With my portable hotspot, everything is great except that the radio thinks it is always on wifi so it doesn't mind wasting data.
Hello,
I use the Huawei E1750 USB 3G dongle. I see it run not stable and do not know the reason. I usually used this dongle in PC before take it to my car.
Sometime, the HU did not recognizes the dongle, most of times, the problem happens when I start the engine from the HU running by battery's power.
I guess the power supply for the USB port is not enough.
My HU is Klyde MCTB-KLD. RK3066, 800 X 480, Malaysk newest 4.4.4 ROM
Is there someone met this issue before? Please kindly share your experience to help me solve this.
Thanks!
vuquan said:
Hello,
I use the Huawei E1750 USB 3G dongle. I see it run not stable and do not know the reason. I usually used this dongle in PC before take it to my car.
Sometime, the HU did not recognizes the dongle, most of times, the problem happens when I start the engine from the HU running by battery's power.
I guess the power supply for the USB port is not enough.
My HU is Klyde MCTB-KLD. RK3066, 800 X 480, Malaysk newest 4.4.4 ROM
Is there someone met this issue before? Please kindly share your experience to help me solve this.
Thanks!
Click to expand...
Click to collapse
I believe others have seen this same problem and used a powered USB hub. Good luck.
vuquan said:
Hello,
I use the Huawei E1750 USB 3G dongle. I see it run not stable and do not know the reason. I usually used this dongle in PC before take it to my car.
Sometime, the HU did not recognizes the dongle, most of times, the problem happens when I start the engine from the HU running by battery's power.
I guess the power supply for the USB port is not enough.
My HU is Klyde MCTB-KLD. RK3066, 800 X 480, Malaysk newest 4.4.4 ROM
Is there someone met this issue before? Please kindly share your experience to help me solve this.
Thanks!
Click to expand...
Click to collapse
Hi guys,
I am also using a HUAWEI E1750 in my Carjoying HU and had the same problems but maybe I found a solution.
At least the behavior of the dongle improved dramatically.
1. At first I updated the firmware to version 11.126.13.00.00.B418
2. I think this is the important point .... I disabled the CD-ROM and SD-CARD function on the dongle.
You can use for that the DC-Unlocker.
In the white window on the bottom I used this command
AT ^ SETPORT = "A1, A2; 1,2,3,7"
You can also check this website
https://www.imei-server.com/415-huawei-at-comands-for-3g-modems.html
der_marv said:
Hi guys,
I am also using a HUAWEI E1750 in my Carjoying HU and had the same problems but maybe I found a solution.
At least the behavior of the dongle improved dramatically.
1. At first I updated the firmware to version 11.126.13.00.00.B418
2. I think this is the important point .... I disabled the CD-ROM and SD-CARD function on the dongle.
You can use for that the DC-Unlocker.
In the white window on the bottom I used this command
AT ^ SETPORT = "A1, A2; 1,2,3,7"
You can also check this website
https://www.imei-server.com/415-huawei-at-comands-for-3g-modems.html
Click to expand...
Click to collapse
I have a Huawei E160 and unfortunately the AT ^ SETPORT command doesn't work on my dongle. In the past I've tried AT^U2DIAG=0 which stopped it from working with my HU - fixed by reset using AT^U2DIAG=276.
Based on the above advice, I'm now trying AT^U2DIAG=3. It works with the HU but time will tell if it has fixed the reliability issues. I'll update this when I know more.
For further info - http://www.3g-modem-wiki.com/page/Huawei+AT-commands
der_marv said:
Hi guys,
I am also using a HUAWEI E1750 in my Carjoying HU and had the same problems but maybe I found a solution.
At least the behavior of the dongle improved dramatically.
1. At first I updated the firmware to version 11.126.13.00.00.B418
2. I think this is the important point .... I disabled the CD-ROM and SD-CARD function on the dongle.
You can use for that the DC-Unlocker.
In the white window on the bottom I used this command
AT ^ SETPORT = "A1, A2; 1,2,3,7"
You can also check this website
https://www.imei-server.com/415-huawei-at-comands-for-3g-modems.html
Click to expand...
Click to collapse
Thank you!
I will try it and get back later
der_marv said:
Hi guys,
I am also using a HUAWEI E1750 in my Carjoying HU and had the same problems but maybe I found a solution.
At least the behavior of the dongle improved dramatically.
1. At first I updated the firmware to version 11.126.13.00.00.B418
2. I think this is the important point .... I disabled the CD-ROM and SD-CARD function on the dongle.
You can use for that the DC-Unlocker.
In the white window on the bottom I used this command
AT ^ SETPORT = "A1, A2; 1,2,3,7"
You can also check this website
https://www.imei-server.com/415-huawei-at-comands-for-3g-modems.html
Click to expand...
Click to collapse
I tried and successed!
The AT-comand must follow this instruction from http://www.3g-modem-wiki.com/page/Huawei+AT-commands
The code for the "AT^U2DIAG=n" command depends on the model of dongle (Support by/Not support by)
The modem did fix quickly and more stable. But bases on the new firmware update feature: "More saving power" with your suggestion: "Disable CD and SD card reader", I think the main reason is the weak power of USB port. So, increase the USB power is more necessary because we may use any other device on it, not 3G modem only.
Thank you!
It hasn't completely fixed mine, the connection still drops out, but it MIGHT be better than before. Can't be sure though. Based on the above advice about firmware reducing power usage, I'll try that next.
This is for the benefit of anyone who owns a Huawei E160:
Do not install the latest firmware 11.609.10.02.432.b418.
After doing this, it wouldn't work with my HU at all. Unable to add APNs - they're not saved as the dongle is not recognised by the HU. It worked on my PC so wasn't broken, but the HU just didn't like it.
I downgraded to 11.609.06.02.94.B409 (was originally on 11.608.02.02.55 so is still an upgrade) and it now works once more.
I'm going to try out the different AT^U2DIAG commands to see if I can improve reliability.
dutchhome said:
I now use a TMobile Z915 mobile hotspot. I plan to install a switch to the battery so I can still use it when travelling, but I can otherwise leave it installed in the car and have it powered by the radio. When the car is turned off, it should kill the power to the hotspot. When power is restored it will power up and have instant wifi..
Click to expand...
Click to collapse
Can you explain this setup more? Maybe some pics? seems like maybe a better scenario than the USB dongle
Hey people,
I have a question. I have a 3g Stick Huawei E1750. It works very good, but I need 4G, because here at the most time only EDGE, and 4G is not supported by the stick. Does anyone knows a compatible working 4g STICK, not a Modem. Thanks
Jaihoidundso said:
Hey people,
I have a question. I have a 3g Stick Huawei E1750. It works very good, but I need 4G, because here at the most time only EDGE, and 4G is not supported by the stick. Does anyone knows a compatible working 4g STICK, not a Modem. Thanks
Click to expand...
Click to collapse
BUMP!
Hey guys,
The Mi PAD 4 is the perfect size(in most cases) for a car dash mounting and will be a great replacement for the now very old Nexus 7.
There have been a lot of development over the years of custom ROMs/Kernels that are specifically optimized for such a use scenario.
I for instance am in the process of collecting the needed cable and accessories but since my ROM building knowledge is very limited at best, would be very happy if there are more people here that think this idea is good and somebody builds us the custom ROM/kernel for that.
So lets discuss this.
What we will need are the following main things:
1. Kernel/ROM that is configured for a landscape use.
2. An option to have the device connected to power all the time but not charging (not to kill the battery)
3. An option to turn on the screen automatically on getting power over the USB port and turning of the device after the power is gone (car turned off) (preferably with a delay of some sort)
4. After power is lost to put the tablet in very low power mode by disabling WiFi/LTE/Bluetooth and so on (again configurable) This is to avoid draining the car battery if left for a long time parked.
5. Simultaneous Charging/OTG (this may actually already be possible, but I have still not found an OTG HUB that works properly with the Mi Pad 4)
probably I have forgotten some more things...
Have in mind that all of those I've mentioned above, already have been developed in one form or another for the Nexus 7, so it should be easier than starting from scratch...
Hey,
i am using my MiPad 4 also in my car. So far it is working fine.
I have connected the MiPad via USB to a carhifi DSP (in my case Helix MiniDSP)
Here are my answers to your points:
1. i am using Evie Launcher in landscape mode.
2. see 5.
3. MiPad is waking up and starts to play music as it detects the DSP on the USB-Port when the car is turned on, and is stopping and turning off when the engine is turned off, this is working with the Pad itself and the app Automate
4. use app Automate to turn off all radios when no USB connection is detected
5. i am not sure if this is related to the hardware of the MiPad or the Kernel, i have tested some CustomRoms but was not able to get it working, so i switched back to preinstalled inofficial international MIUI-Rom
Thanks
Hehe i also use it in the Car It was also a Replacement for my old Nexus 7 2013.
mfkomega said:
5. i am not sure if this is related to the hardware of the MiPad or the Kernel, i have tested some CustomRoms but was not able to get it working, so i switched back to preinstalled inofficial international MIUI-Rom
Click to expand...
Click to collapse
Can you please throw some more light on the "preinstalled inofficial international MIUI-Rom" ROM where simultaneous OTG+Charging is working for you? Is this is the fake ROM (as people call it) that vendors install after unlocking the bootloader and then sell it to you?
May be a link to the ROM (if its downloadable) or a screenshot of the ROM information from the tablet, will help.
TIA.
sara.ramli said:
Can you please throw some more light on the "preinstalled inofficial international MIUI-Rom" ROM where simultaneous OTG+Charging is working for you? Is this is the fake ROM (as people call it) that vendors install after unlocking the bootloader and then sell it to you?
May be a link to the ROM (if its downloadable) or a screenshot of the ROM information from the tablet, will help.
TIA.
Click to expand...
Click to collapse
https://forum.xda-developers.com/showpost.php?p=80816927&postcount=11
Now that I was able to make OTG+Charging work with HavocOS, am proceeding to replace the Nexus7 in my car with the Pad. Will let you all know how it goes.
I'm also thinking about installing a mi pad 4 into my car. Any news on a good setup and ROM?
samu95 said:
I'm also thinking about installing a mi pad 4 into my car. Any news on a good setup and ROM?
Click to expand...
Click to collapse
HavocOs is working great so far in my car setup.
Which havoc os rom are you using? I flashed the current build today and otg plus charge doesn't work. It's one or the other.
I will next month also run a project for building in my mind in the cars radio mount (2din). So far I found Headunit Reloaded is really cool to have Android car working perfectly! For volume control I use a floating volume button (Virtual Volume Button on Play store).
But the rest I will figure out next month when I get my car finally haha