Dead WIFI on android 4.0.1 - Android Q&A, Help & Troubleshooting

I have a 4.0.1 device (car stereo actually, I could post to that thread, but here I will probably pass with more attention).
WIFI sometimes works and sometimes doesn't - I simply can't turn it on.
It stucks at "Wifi turning on" and switch goes back to gray.
When it works it works for few days, and when it doesn't I can't turn it on for like a month. Right now that's the case.
WIFI device is an external USB wifi stick. Stick works elsewhere, and I tried with another one, they both work.
I believe the problem is in the software.
On some devices it can be solved via deleting some files in the system. Has anybody got some ideas how to fix it?
Usually when it works stick LED starts flashing right at boot.
Regular data usb stick also works in that port.

Related

SGSII and bluetooth

I have a weird problem with my SGSII. If i connect my phone to my car bluetooth with the car charger, it stay connected for as long as I am in the car. If however i connect to the car on battery, once the screen turns off I lose bluetooth connect. I have tried changing the screen time and that didn't work, I also tried making my bluetooth visable always and that also didn't work. Can't understand why it only happens while on battery.
Any suggestions?
I have the same issue with bluetooth on my SII.
Whenever the screen is asleep bluetooth devices will not connect, I have to turn the screen on to allow the devices to connect.
I've setup auto pairing in the linkkeys file which works fine if the screen is on (so no prompts to pair devices, just works).
The main device I want to use is a liveview, which I understand has problems, but I've tested other devices and the phone seems to be at fault.
It can't be designed that bluetooth will only connect if your using your phone, kinda defeats the purpose of most bt devices.
tried making my phone always visible, and even tried disabling the lock screens.
using CM7 stable, and a fix would be highly appreciated!
Hmmm.... I don't have that problem.
Maybe some weird power save option?
that's what I was thinking, but I've not been able to find any settings on the phone or through google.
I've just updated to the latest cm7 nightly and the problem seems to be the same. It has an addition bluetooth setting called 'Fast Connections' but this doesn't seem to change anything.
The only other thing I've noticed is that the linkkeys file that I edited to allow the liveview to auto pair (without me having to pull down the notification bar nad authorise it) seems to keep re-editing the file so the phone prompts to pair, so I'm assuming now that's the issue rather than a power thing, so how to prevent that?

[Q] Wifi not usable, ideas?

Hi,
This morning I randomly decided to update my firmware (as per Sony's incessant reminders). I updated to 17.1.1.A.0.402, as it was what Sony's updating app was telling me the latest firmware was. I updated as instructed on my tablet, wirelessly. The update was successful and totally uneventful -- no incidents whatsoever.
However, immediately after my update, my wifi dropped, and after that, I couldn't reconnect to *any* wifi network whatsoever. I toggled on/off, and the wifi would reconnect for a matter of seconds, maximum 2-3 minutes before dropping and never reconnecting again. To reconnect to wifi, I'd have to toggle off/on again and then would have seconds to try and load a page (but would never succeed)
So, I updated the firmware again, this time using the update application for the Mac since my tablet could no longer connect to wifi.
I successfully updated to 17.1.2.A.0.314.
Still the same wifi dropping and not coming back issues.
Then I tried "repairing" my software from the Mac, which I'm lead to believe erases everything and flashes with the most recent firmware.
Still had the same wifi issues.
Then I tried an erase/factory reset directly from the tablet.
I still have the same wifi issues, but they don't kick in within seconds anymore. Now after several minutes, the wifi will drop and not come back.
Any suggestions for a fix? I'm as of yet unrooted, and would like to remain that way if possible...
Thanks!
I would suggest a factory reset after flashing the update. Might solve your problem.
Before that you could try to delete your Wi-Fi and set it up again...
Vaetheran2107 said:
I would suggest a factory reset after flashing the update. Might solve your problem.
Before that you could try to delete your Wi-Fi and set it up again...
Click to expand...
Click to collapse
Thanks for your help
"Repairing" from this Mac app is flashing the update, correct? It erased and then flashed anyway. Had to set up the tablet like it was new. Is that not a factory reset?
In any case, I did a factory reset immediately afterwards, from the settings screen of the tablet, as mentioned above.
By "delete your wifi" do you mean "forget" the networks I'm trying to connect to? If so, I've done that many times, and have had to re set up my wifi networks anyway upon each factory reset/flash/erase.
So I think I tried what you suggested, and no dice, unless I've misunderstood?
Perhaps worth noting: I'm using the accompanying Sony Bluetooth keyboard.
Wifi seems to stick around a bit longer when Bluetooth is toggled off (no keyboard), though I could use the Sony keyboard before the update, no problem at all.
Yes that was what I ment.
Sorry it didn't help solving your problem.
Seems like you should call Sony.
It's the Bluetooth. Wifi and Bluetooth are on the same chip and won't work at the same time. It's a hardware fault with pretty much every Android system I've used. Turn off the Bluetooth and your wifi will be fine.
Thanks for your reply – though it was possible to use the bluetooth keyboard at the same time as wifi before the update.
Bluetooth keyboards would be pretty pointless if you couldn't use wifi at the same time as you use the keyboard, wouldn't they?
Between the Sony Xperia Z2 tablet, a Samsung Galaxy Tab S, and an iPad, I've used all with bluetooth keyboards + wifi without issues (until this firmware update on the Z2).
Use 5GHz Wifi, then the problem will be solved.
Sounds like you have been lucky so far and due to the small amount of data a bluetooth keyboard transmits. Bluetooth headphones are always transmitting as is wifi when watching hd youtube videos. They will always interfere with each other, but only every minute or so. Google the problem and you'll see its pretty universal.
heathr said:
Hi,
This morning I randomly decided to update my firmware (as per Sony's incessant reminders). I updated to 17.1.1.A.0.402, as it was what Sony's updating app was telling me the latest firmware was. I updated as instructed on my tablet, wirelessly. The update was successful and totally uneventful -- no incidents whatsoever.
However, immediately after my update, my wifi dropped, and after that, I couldn't reconnect to *any* wifi network whatsoever. I toggled on/off, and the wifi would reconnect for a matter of seconds, maximum 2-3 minutes before dropping and never reconnecting again. To reconnect to wifi, I'd have to toggle off/on again and then would have seconds to try and load a page (but would never succeed)
So, I updated the firmware again, this time using the update application for the Mac since my tablet could no longer connect to wifi.
I successfully updated to 17.1.2.A.0.314.
Still the same wifi dropping and not coming back issues.
Then I tried "repairing" my software from the Mac, which I'm lead to believe erases everything and flashes with the most recent firmware.
Still had the same wifi issues.
Then I tried an erase/factory reset directly from the tablet.
I still have the same wifi issues, but they don't kick in within seconds anymore. Now after several minutes, the wifi will drop and not come back.
Any suggestions for a fix? I'm as of yet unrooted, and would like to remain that way if possible...
Thanks!
Click to expand...
Click to collapse
I also have the problem but my tablet has 3 days of new it was working perfect the I update to 17.1.2.A.0.314 and the it kick me of the WiFi in the configuration it stays on obtaining IP address and never get it I have to restart the tablet and then the WiFi connect like nothing I turned off today I turn it on and the problem again appear >.< this time I restarted the modem and it worked.
So I don't have idea what happens first time restart the tablet work now restart the modem worked.
I will try changing to 5ghz to see if the problem it's solved or go to warranty it only has 3 days!!!
WiFi and bluetooth
Wing00w0 said:
I also have the problem but my tablet has 3 days of new it was working perfect the I update to 17.1.2.A.0.314 and the it kick me of the WiFi in the configuration it stays on obtaining IP address and never get it I have to restart the tablet and then the WiFi connect like nothing I turned off today I turn it on and the problem again appear >.< this time I restarted the modem and it worked.
So I don't have idea what happens first time restart the tablet work now restart the modem worked.
I will try changing to 5ghz to see if the problem it's solved or go to warranty it only has 3 days!!!
Click to expand...
Click to collapse
Hi, here's my experience with my Z2 tablet, unrooted. I too have had wifi problems: after using the tablet fine for a while, with a strong signal, the tablet drops out, then wifi access stalls whilst "Obtaining IP address". I sometimes use a Bluetooth Microsoft keyboard, but have had the wifi drop out when I have Bluetooth off.
The only reliable (so far) solution I have found is to move to a static IP address. Not ideal, and perhaps not much help when travelling, but an OK workaround for a home or other wifi network where you have admin access to the router.
Hope that helps. Apologies if my newbie post is naive.

Wifi being stuck on or on/off troubleshooting

So I know this topic has a few posts many a year or so old but I'm looking for a possible work around for this issue. Here's a background of what happened:
I have a rooted note 4 originally running cm12, I wanted to return to a stock build and when I did something happened (can't remember what) and my wifi stopped working it would click on them immediately off my first thought was kernel so I flashed a new one but didn't help I tried a different stock build 5.0.1 instead of 5.1.1 but still same issue. I went back to the cm12 and that seemed to work fine still, I looked for another stock build because I'm stubborn and flashed a different kernel than the previous ones I've tried. This seemed to fix my wifi issue at least for a day then back to the same issues. Anyway here's what I've been messing with to try and figure this out.
I'm focused around the file wpa_supplicant.conf as I've tried restarts and all that but that won't do anything. What I have noticed recently is when I don't have any networks saved in that file I can toggle airplane mode and try toggling wifi, after a few sometimes dozen attempts it comes on and works fine so long as it stays on. If I turn it off I have to restart my process of going into wpa_supplicant.conf>deleting my saved network>toggling airplane>then spamming wifi. As I'm able to repeat this it leads me to believe it's not hardware related, slim chance on loose cable, But if there's a way to prevent the system from auto saving a password that might help with a workaround. I've tried changing that files permissions as well as the ones in the system>etc>wifi folder but they get changed back
Anyway I'm still working on finding the root cause but will update if I find anything also tried deleting the wpa file and that works to after a restart but issue comes back and so does file which doesn't seem to me that its a corruption issue
Update:
So I somehow crashed my Samsung messenger app switch to hangouts and then back so decided to wipe my phone and refresh the OS. I factory reset then advanced wiped cache, dalvik, system and data. When it rebooted I tested the WiFi in the system setup and it worked fine I could turn it on and then off normally so I decided to continue setup once fully setup and no other apps installed I retested the WiFi. It worked fine I connected to an access point and it stayed connected I then forgot the network cycled wifi and tried again and again still worked so I let it sit and would test it throughout the day. About an hour or so later the problem reappeared which was odd. I did my old workaround deleting wpa_supplicant.conf and toggling wifi until it turns on. I got it to turn on and connect to my home WiFi and left it, so far I've kept my wifi on and it's stayed active for 24hours now and reconnects fine to my home router when I'm in range and back to lte when I'm away so right now it seems I can have wifi if I don't toggle it off. Still not sure what's causing this issue as since I'm currently using wifi to write this I don't see it as a hardware issue. After trying multiple kernels I don't see that as the cause either, although possible. Will keep messing around and update if I find anything further
Update 2: so far I've been able to keep my wifi working great as long as I keep it on and don't toggle it off. Doing this has kept it active and auto connecting to my home wifi for a week straight. I make sure to keep wifi I during sleep so it won't disconnect but it also seems to stay active through restarts which is great. This still leads me to believe it's software related and not hardware but not sure where the issue is.
Update 3:
So far I've just kept my wifi on while trying to find the issue. The only other issue I've come across was since my wifi is on 24/7 and auto connects if I want to use my lte instead i have to either turn off wifi or forget my home network which neither is an option. But I have found a solution:
I was able to add a shortcut to my home screen that actually disables the current wifi connection without disabling wifi and forgetting the password. To do this you must have Tasker just create a new task in second tab, I named mine disconnect wifi, click the plus sign and select "net", next select "wifi net" there is an option that says disconnect. Have that selected then go back and thats it,add in icon on bottom right to use as a shortcut. I've tested this and it works great one tap and it disconnects the wifi but keeps wifi turned on and if I want to re connect just go into WiFi settings and choose the one to connect to

Phone charges only when turned off, when turned on USB is not even recognized

Hi,
I came across a charging problem recently (happened all of a sudden, no clue why it is happening). My phone(m2 max pro) charges only I turn it off, when turned on the USB connection is not even recognized.
So, the only way to charge my phone is to switch it off!. This appears to be not so very rare problem, there are few posts out there (with different phones) complaining the same problem, but no working solution yet.
Few things:
1. Current rom is Arrow OS(m2 max pro), Android Pie.
2. Restarting the phone with the charger connected helps. The USB will still not be recognized though, but the phone charges(although, it charges slowly, the lockscreen shows - "charging slowly").
But, If I later disconnect and reconnect the charger it won't charge anymore, I have to restart with charger connected again.
3. Tried cleaning the USB port, tried clean flashing the rom(even with a different one), did not work.
5. Tried moving/adjusting the pin in the USB port slightly (recommended in one of the posts), did not work. Although, I didn't fiddle around this much, afraid I might damage the pin/port, will try again.
6. Tried draining it off completely to 0% until it auto shuts off and then charge it until 100% (this was recommended in one of the posts), did not work.
7. Tried different USB cables and ports(including original charger and wall port), did not work. I don't think this is a problem with cables/port.
I still think this was some kind of software problem, I hoped clean flashing the rom will fix this but was surprised to see that it does not!. or is it a hardware problem?
Anyone has a fix for this or seeing same symptoms(If so, how did you get around this)?
Thank you.
This is fixed now, after caliberating the battery(with a rooted app)
-> Rooted the phone(installed magisk), wiped cache and rebooted.
-> Installed Battery caliberation app[ROOT] (https://play.google.com/store/apps/...ot.superthomaslab.batterycalibration&hl=en_IN) and caliberated the battery.
-> Did a reboot and the problem went away
I didn't even had to wait until 100% to caliberate the battery (but the app recommeds so)
[EDIT]
The problem came back after a while, now its kinda randomly happening, most of the times it seems to work fine.
But, then again, it only charges, it does not recognize USB connection(to PC, which I used to connect to successfully previously), I don't see the "touch for more usb options" notification either. A workaround to this is to change the default usb configuration(in developer tools) to a different one (I am switching between File transfer, No data transfer, PTP), but as soon as you disconnect and reconnect the problem resurfaces (you'll have to again switch the default usb configuration and then reconnect)
I am perplexed!, I thought this is clearly a software issue and I hoped it would go away if I clean flash rom (the exact same build which worked fine previously, also cleared everything including vendor partition and excluding external sd card)

Lg v60 Problem with wifi

When I click my wifi icon it lights up like it's trying to turn on, but turns off after a few seconds without connecting. I can temporarily fix the problem by restarting my phone. It will turn on and connect after restarting. But if I turn the wifi off and back on again, it has the same problem. I really don't want to have to restart my phone every time I want to use the wifi, so if anybody has any idea how to fix this, that would be awesome.
Never had that issue, I'm currently on latest fw v10m and no issues at all, connected to Wi-Fi ax router.
Is this a mesh type access point. Been having issues with google wifi. It stops connecting to the same ap after a while but it will connect to the other ap's . Once I reboot I'm back to normal. There is another thread with this info. Unfortunately no fix yet, looks like a bug. Hopefully it will be fixed in the next update.

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