Develop Bugs

Impenetrable WIFI Sleep Problem

After checking couple of forums, I realized that this is a general bug for Android. Many people complain about it but it seems nobody could find an exact solution. I will try to explain the problem to be more precise.
Even though "Keep Wi-Fi on during sleep" is checked as "Always", when the phone goes to sleep it doesn't connect to internet.
Wifi signal shows it is connected but it is not. I have to disable/enable wifi in order to make it work.
You can see many posts regarding to this issue. It looks like people acquiesced the problem since nobody found an exact problem.
Is there any solution that you could find?

I dont have that issue at all.....using gsm nexus.
Wifi is great actually

Bigal77 said:
I dont have that issue at all.....using gsm nexus.
Wifi is great actually
Click to expand...
Click to collapse
+1 same here, never noticed any problem
Sent from my Galaxy Nexus using xda premium

I have GSM Nexus also.
I bought it 3 days ago. I noticed it right after I powered it on. I had similar issue with my HTC Desire.
Now I installed a ROM to try it and still no luck. I started to think that problem is because of modem.
What ROM & Kernel are you using?
Bigal77 said:
I dont have that issue at all.....using gsm nexus.
Wifi is great actually
Click to expand...
Click to collapse
Tjotte said:
+1 same here, never noticed any problem
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse

try Advanced Wifi Lock

Tried doesn't work
sshams95 said:
try Advanced Wifi Lock
Click to expand...
Click to collapse

No problem with this.
Using all stocks on 4.0.2.
Sent from my Galaxy Nexus using xda premium

This happens to me. I picked up some gameloft games in the 99 cent sale and downloading 800mb over wifi is impossible. The screen turns off and the download fails.
I found I have to set the screen to stay on when on USB, plug it into a wall, and download.
I've been on several roms. I haven't started experimenting with kernels but thats the fix I think in this case. Even CM roms do this. Hopefully it isn't hard coded into the hardware.
LTE EX Galaxy Nexus CM9
Asus Transformer Revolver

player911 said:
This happens to me. I picked up some gameloft games in the 99 cent sale and downloading 800mb over wifi is impossible. The screen turns off and the download fails.
I found I have to set the screen to stay on when on USB, plug it into a wall, and download.
I've been on several roms. I haven't started experimenting with kernels but thats the fix I think in this case. Even CM roms do this. Hopefully it isn't hard coded into the hardware.
Click to expand...
Click to collapse
You could set your screen sleep policy to wait 30minutes to turn off. Surely wouldn't take longer than that.

+1...downloading game loft games is not possible. The game only downloads on wifi but the download stops after the screen goes to sleep.
Edit: Just tried downloading 300mb of game loft game data and it works even when screen is off. Im on AOKP BUILD 17, I definitely had this problem on stock 4.0.2.
Sent from my Galaxy Nexus using Tapatalk

I had the same problem with my stock rom. I still have problem. I didn't try any other rom until now. I think I should give a try.

SNaReX said:
I had the same problem with my stock rom. I still have problem. I didn't try any other rom until now. I think I should give a try.
Click to expand...
Click to collapse
I am my second Galaxy Nexus due to other issues. The first one did not have this wifi sleep issue, but my current GN does ( I installed a VOIP app on the second that was not on the first... not sure if this has anything to do with the wifi sleep issue). I think I may have found a work around. I changed the setting to never and tested a few times. Then I changed it to always again and now wifi remains on while the phone sleeps. I have tested it a few times and so far it is still working. I will update the post if the problem reoccurs.
Stock ROM (4.0.2)

You know what,I have the opposite issue.my wifi never shuts off.... I just leave it.wifi on this is way way way more battery efficient than my galaxy s. Even the cell radios are pretty awesome. Hardly take any battery at all.
Sent from my Galaxy Nexus

I updated my kernel and its fixed. Downloaded MC3 finally.
LTE EX Galaxy Nexus - AOSP KANG
Asus Transformer - 3.2.1 OC/UV

How do I diagnose random reboots for my Note 2?

For the past 4 days my Note 2 has randomly rebooted at least once a day. I wasn't using the device for most of the reboots and just noticed that it rebooted because of battery drops. I don't really know what could be the cause since I don't remember changing anything recently. Is there any way I can diagnose this without root?

How about just flash stock rom? If you dont have lots of apps which you've used, then it should take care of problem without needing titanium backup which needs root. Just save ur data using kies and flash stock rom from sammy.

badbadtz.carlo said:
How about just flash stock rom? If you dont have lots of apps which you've used, then it should take care of problem without needing titanium backup which needs root. Just save ur data using kies and flash stock rom from sammy.
Click to expand...
Click to collapse
I'm actually currently on stock and unrooted. I was just wondering if there were ways to find out what caused the reboot such as logs and such? Or if there was an app I could install to keep track of what causes a forced reboot?

cesss said:
I'm actually currently on stock and unrooted. I was just wondering if there were ways to find out what caused the reboot such as logs and such? Or if there was an app I could install to keep track of what causes a forced reboot?
Click to expand...
Click to collapse
You could download alogcat from the marketplace, its free and will save a log of what's going on with your phone.
It might help find out why its happening

for me it happens cause the power button is so easy to press while phone is in pocket.
keep it pressed for some seconds by accident and phone reboots. even if screen is locked.

cesss said:
For the past 4 days my Note 2 has randomly rebooted at least once a day. I wasn't using the device for most of the reboots and just noticed that it rebooted because of battery drops. I don't really know what could be the cause since I don't remember changing anything recently. Is there any way I can diagnose this without root?
Click to expand...
Click to collapse
If your rooted run a logcat and that will tell you what happened right before the reboot, reboots are usually a Kernel Panic meaning something caused a big enough problem that it couldn't be recovered and crashed the core of Androids software "The Kernel".
As others have noted flashing a stock rom ideally via ODIN and then testing your phone may let you know if you had bad software or a hardware issue. Custom roms can have bugs that will cause kernel panic a stock rom should be 100% fine and reboot free

I find mine will sometimes reboot after copying something to the clipboard.
Sent from my GT-N7100 using xda premium

I had reboots on my previous unrooted HTC EVO. The problem was an app. I was able to diagnose the problem by looking at my install/update log. Basically, I uninstalled all apps back to the date I knew it was stable and waited to verify it was stable. Then added back one app only and waited. Repeat. About a week later, I added an app that caused a reboot within hours. I uninstalled it and the phone remained stable.
Here's where I found a chronological listing. If you have multiple devices, it will show all apps for all devices (tablets, vizio, phones,etc)
Google Play> My Android Apps> at the bottom My Orders & Settings.
This gives you a cronilogical listing of app installs and updates.
Mine turned out to be a call recorder app that I had put on the phone 4 weeks previous.

Seems like a Samsung issue:
http://androidforums.com/samsung-ga...-s3-crashing-when-copying-text-clipboard.html
I've got the same problem worth my note 2. At least I know I'm not alone.
Sent from my Galaxy Note 2 using Tapatalk 2

Bad SD cards are also a notorious source for spontaneous reboots. If you have one inserted, it should be easy enough to retract it for a while to test it. ..
Note'd too from my N7100...

I'm also experiencing this issue. I'm using 4.1.1 Brazilian stock ROM here.
Even before flashing CWM (yesterday) I as going through this problem. Most times it happens when the screen is off.
Maybe changing the stock Kernel to a custom one would solve this?

[Q] Random Reboot

Hi,
History:
I have a problem with my Nexus. It randomly reboots. Nothing seems to help.
It started after a few months after I was rooted on CyanogenMod 10.0. In 3 days, it quickly escalated to a reboot every 10 minutes on average.
A factory reset (without user apps installed on it) on CynogenMod reduced the frequency (every hour?), but didn't eliminate it.
Unrooting to stock Jellybean 4.1.2 seemed fine only in the first week. The problem came back afterwards, and updating to JB 4.2.1 didn't help.
Now, 2 months on stock ROM, I get even more random times. Sometimes it is 2 times a day, sometimes once a week.
Just before it:
I get a metallic screeching noise for 1-2 seconds, and immediately following that, device turns off with a "pang". Although these days I HAVE had situations that the sound came for up to 3 seconds (and the screen freezes), but the phone worked normally afterwards.
What happens:
It randomly reboots. The rebooting is at irregular intervals, whatever i was doing on it (even when not using it).
What happens after:
It takes much, much longer to startup again. It can get stuck at the "Google" logo screen for up to 5min. It doesn't take this long to reboot if I shut it down myself.
Any ideas? What causes this? Is it software or hardware?
Can I even send it for warranty if I cannot reproduce the problem?
I don't want to send it to warranty if I don't have to. I don't want to loose my phone for I don't know how long.

Hi, what's your eMMC version? Maybe buggy memory, try looking at other threads.
Отправлено с моего Galaxy Nexus через Tapatalk

Have you tried different batteries?
GeeNex | Carbon nightlies | Rubiks

I'm new to this eMMC thing, but according to an app my eMMC Type is V3U00M. To check whether it is buggy or not it needs root, which I don't currently have. If it IS buggy, I don't have a choice but to bring it for warranty right?
No, I have not tried to changed batteries. I don't have other batteries. But can the problem really lie with the battery? Btw, my phone is less than 8 months old.

Djalaal said:
I'm new to this eMMC thing, but according to an app my eMMC Type is V3U00M. To check whether it is buggy or not it needs root, which I don't currently have. If it IS buggy, I don't have a choice but to bring it for warranty right?
No, I have not tried to changed batteries. I don't have other batteries. But can the problem really lie with the battery? Btw, my phone is less than 8 months old.
Click to expand...
Click to collapse
Well, try waranty, that chip is buggy. Mine too )) but I just live with it using lagfix app and discard mount options, but things requires root. Good luck.

krugdenis said:
Well, try waranty, that chip is buggy. Mine too )) but I just live with it using lagfix app and discard mount options, but things requires root. Good luck.
Click to expand...
Click to collapse
Well, I am planning to root again. I want to switch back to CyanogenMod 10.1. Lagfix app isn't needed if you can use -discard mount option right? How to use either, if let's say I'm on CyanogenMod. This is also the first time I hear of lagfix and discard mount... :/
Btw, the app i used to check my eMMC Type said that my chip is ok. No brickbug. Are you sure it's buggy?

http://code.google.com/p/android/issues/detail?id=39154
Отправлено с моего Galaxy Nexus через Tapatalk

I might be wrong here, but from what I've read at the link and other xda posts (http://forum.xda-developers.com/showthread.php?t=2029246), the V3U00M chip is not buggy (in the sense that it's stable for rooting and using the -discard command), but it does give slowdowns. I do have horrible slowdowns, so thanks for that solution I didn't know existed. However, this doesn't solve my random reboot problem at all...

No one else got any solid way to find out the source of the problem?

BUMP

Djalaal said:
Hi,
History:
I have a problem with my Nexus. It randomly reboots. Nothing seems to help.
It started after a few months after I was rooted on CyanogenMod 10.0. In 3 days, it quickly escalated to a reboot every 10 minutes on average.
A factory reset (without user apps installed on it) on CynogenMod reduced the frequency (every hour?), but didn't eliminate it.
Unrooting to stock Jellybean 4.1.2 seemed fine only in the first week. The problem came back afterwards, and updating to JB 4.2.1 didn't help.
Now, 2 months on stock ROM, I get even more random times. Sometimes it is 2 times a day, sometimes once a week.
Just before it:
I get a metallic screeching noise for 1-2 seconds, and immediately following that, device turns off with a "pang". Although these days I HAVE had situations that the sound came for up to 3 seconds (and the screen freezes), but the phone worked normally afterwards.
What happens:
It randomly reboots. The rebooting is at irregular intervals, whatever i was doing on it (even when not using it).
What happens after:
It takes much, much longer to startup again. It can get stuck at the "Google" logo screen for up to 5min. It doesn't take this long to reboot if I shut it down myself.
Any ideas? What causes this? Is it software or hardware?
Can I even send it for warranty if I cannot reproduce the problem?
I don't want to send it to warranty if I don't have to. I don't want to loose my phone for I don't know how long.
Click to expand...
Click to collapse
Same as you man...
I'm seriously considering throwing my phone to the garbage. I don't like iPhones, but google is really pushing me into it with this crappy piece of phone. Is so frustrating to have these rebooting issues, I've tried everything, from wipe to factory reset, back to stock, flash custom ROMS and KERNELS, turning location access off, uninstalling all apps/widgets that might interfere, and every single "solution" it's out there, and STILL I'M HAVING THESE DAMN REBOOTS!
Now it's even worse, I can't even transfer files to my phone anymore because, guess what... IT REBOOTS! everytime I transfer ANY KIND of file.
The only thing that seems to work for a while is reformatting and start from scratch. I've done that like 3 times already. But still after a few weeks the issue reapears... i'm really mad about this, and no one seems to care. Not Google and not even Samsung.
The only interesting thing that i found around the internet is this guy's findings
plus.google.com/113601948978986762347/posts/2ALASEC1dG2
I read the log on my phone and matches to his... but now the thing is, what do i do with this information? I'm not a programmer o something like that.
Any ideas?

I think your board is faulty. Even so, have you tried disabling SR and raising voltages across the board? Trimming eMMC? Omapflash?
a manta wrote this.

Hey! Thanks for the reply but I'm just a regular user with just a little bit of computer knowledge... so the things you mentioned are basically Chinese to me
Sent from my Galaxy Nexus using xda app-developers app

elcampeondelrodeo said:
Hey! Thanks for the reply but I'm just a regular user with just a little bit of computer knowledge... so the things you mentioned are basically Chinese to me
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
He is saying that you have root you need to install trickster mod from the play store. Open the app and go to specific. Then disable the smart reflex toggles and click the oké button in the upper right corner see if that works. If it doesnt re enable smart reflex and go tot MPU voltages. Next to the words MPU voltages there is a blue plus/minus button. Click that and click the plus one time. Accept it and push again the oke button. The other two things I dont exactly know..
Sent from my Galaxy Nexus using XDA Premium HD app

Honestly, if you are getting reboots on a clean stock (including stock kernel) , it's probably a hardware issue.
Sent from my Galaxy Nexus using Tapatalk 2

Thanks for the reply guys!
mrgnex said:
He is saying that you have root you need to install trickster mod from the play store. Open the app and go to specific. Then disable the smart reflex toggles and click the oké button in the upper right corner see if that works. If it doesnt re enable smart reflex and go tot MPU voltages. Next to the words MPU voltages there is a blue plus/minus button. Click that and click the plus one time. Accept it and push again the oke button. The other two things I dont exactly know..
Sent from my Galaxy Nexus using XDA Premium HD app
Click to expand...
Click to collapse
I tried both things you mentioned with no luck
I'm still searching around for those other things beekay201 mentioned earlier. I found that Omap Flash is a tool for flash roms in binary mode, so that way you can unbrick some phones. Still trying to find out how that can be useful for my case (forum.xda-developers.com/showthread.php?t=1242330)
bpyazel said:
Honestly, if you are getting reboots on a clean stock (including stock kernel) , it's probably a hardware issue.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
The thing is that after a clean stock install everything works fine for a week or two, that means no random reboots, and i can transfer any kind of file of any size with no problem. Then for some estrange reason (even with no crazy apps installed) starts with a random reboot, after that first reboot i know is time and that i wont be able to transfer files anymore, because it WILL reboot while i'm transfering files. Other thing i have noticed is that around where the camera lens is, get really hot. So I think that the reason it reboots is kernel panic caused by overheating, or the other thing is that my sdcard have some issues when writing files.
Right now i'm using CyanogenMod 10.0.0-maguro with jelly bean 4.1.2 and franco.kernel 3.0.51-nightly-512GPU and i have already tried going back to stock.
how can a I check if my hardware is fine? Is there any app out there?
Thanks!

elcampeondelrodeo said:
Thanks for the reply guys!
I tried both things you mentioned with no luck
I'm still searching around for those other things beekay201 mentioned earlier. I found that Omap Flash is a tool for flash roms in binary mode, so that way you can unbrick some phones. Still trying to find out how that can be useful for my case (forum.xda-developers.com/showthread.php?t=1242330)
The thing is that after a clean stock install everything works fine for a week or two, that means no random reboots, and i can transfer any kind of file of any size with no problem. Then for some estrange reason (even with no crazy apps installed) starts with a random reboot, after that first reboot i know is time and that i wont be able to transfer files anymore, because it WILL reboot while i'm transfering files. Other thing i have noticed is that around where the camera lens is, get really hot. So I think that the reason it reboots is kernel panic caused by overheating, or the other thing is that my sdcard have some issues when writing files.
Right now i'm using CyanogenMod 10.0.0-maguro with jelly bean 4.1.2 and franco.kernel 3.0.51-nightly-512GPU and i have already tried going back to stock.
how can a I check if my hardware is fine? Is there any app out there?
Thanks!
Click to expand...
Click to collapse
512GPU? You mean your GPU is overclocked? Maybe try to set your GPU to stock. And if it gets really hot and you have random reboots you can try to over volt with trickster mod.
Sent from my Galaxy Nexus using XDA Premium HD app

mrgnex said:
512GPU? You mean your GPU is overclocked? Maybe try to set your GPU to stock. And if it gets really hot and you have random reboots you can try to over volt with trickster mod.
Sent from my Galaxy Nexus using XDA Premium HD app
Click to expand...
Click to collapse
No, I don't think my GPU is overclocked, that's the full name of the kernel, you say that the kernel automatically puts my GPU to 512?. Anyways i just installed that kernel two days ago just because i thought it might make the reboots go away. I'm having rebooting problems since february (just after upgrading to 4.2.1), so i don't think that the GPU is causing the reboots.

elcampeondelrodeo said:
No, I don't think my GPU is overclocked, that's the full name of the kernel, you say that the kernel automatically puts my GPU to 512?. Anyways i just installed that kernel two days ago just because i thought it might make the reboots go away. I'm having rebooting problems since february (just after upgrading to 4.2.1), so i don't think that the GPU is causing the reboots.
Click to expand...
Click to collapse
Well if it keeps rebooting you can try to over volt. Maybe that helps.
Sent from my Galaxy Nexus using XDA Premium HD app

OK I'll try that! Thanks for your help man!
Sent from my Galaxy Nexus using xda app-developers app

Sleep of Death - TBSGS4 Rom

I don't have enough posts to post in the thread specific to this ROM.
Anyway, I just installed version 2.1 today and get the sleep of death every time the phone goes to sleep (both the timed sleep or me manually locking). The power button has no effect. Even holding it down does not do a force restart. I initially did a dirty flash thinking that was the problem. I did a clean flash and now am still getting the problem. Using the phone seems to be fine other than this issue... which isn't a small issue I can just overlook.
An incoming phone call is the only thing that I've seen wake it up.
Any ideas? Bad download?

I've had the same issue. Also my 3G wouldn't work on that ROM and I had the JB modem installed. I just want back to ol' faithful, CM10.1 some people are having an awesome experience with that ROM but I wasn't.
Sent from my SPH-D710 using Tapatalk 4
Sent from my SPH-D710 using Tapatalk 4 Beta

I love CM ... However, it has one huge flaw. I can't use the MHL out. I need to be able to use that.

Please read forum rules before posting
Questions and Help issues go in Q&A and Help section
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator

thinkbig12 said:
I don't have enough posts to post in the thread specific to this ROM.
Anyway, I just installed version 2.1 today and get the sleep of death every time the phone goes to sleep (both the timed sleep or me manually locking). The power button has no effect. Even holding it down does not do a force restart. I initially did a dirty flash thinking that was the problem. I did a clean flash and now am still getting the problem. Using the phone seems to be fine other than this issue... which isn't a small issue I can just overlook.
An incoming phone call is the only thing that I've seen wake it up.
Any ideas? Bad download?
Click to expand...
Click to collapse
Try to disable the ripple effect and see if that helps. Also check the md5 of the download to make sure it isn't a bad download; if you search the play store for md5 checker, it will make the process easier, but you could also use ES File explorer.

[Q] Weird WiFi Issue (Wont Turn On)

Hello all,
Its been a while since I had an issue with my phone but this one is really bothering me. Last week for no reason at all I noticed my WiFi was turned off while at work. When I tried to use the drop down widget to turn it back on it would just stay gray for like 5-10 seconds then go back to the off position. So I went into settings and tried to turn it on the long way and got the same result. This was troubling to me because I had made no changes to my phone that could have effected this. So after doing some digging around online and not finding any answers I contacted Samsung tech support who was terribly uninformed about their product and offered very little help with my problem. They suggested I go into the application manager and reset the application preferences. I was skeptical because I had spent a considerable amount of time disabling all the bloatware that was not needed in the past but I did take the advice of tech support and to my surprise it did get wifi working again.. temporarily that is.
Today I did the OTA 4.4.2 Kit Kat upgrade in hopes that it would fix my issue and to my shock and surprise it did. Wifi worked flawlessly for a few hours but then all the sudden earlier today it just shut off again without notice. Now once again, it will not turn back on no matter what I try. Im thinking this could potentially be a hardware issue. If it is then why after the upgrade to 4.4.2 did it work so well for a few hours?
Any help would be much appreciated as I have chewed through nearly all of my monthly data allocation while trying to find a working fix.
Thanks in advance!

KingKash420 said:
Hello all,
Its been a while since I had an issue with my phone but this one is really bothering me. Last week for no reason at all I noticed my WiFi was turned off while at work. When I tried to use the drop down widget to turn it back on it would just stay gray for like 5-10 seconds then go back to the off position. So I went into settings and tried to turn it on the long way and got the same result. This was troubling to me because I had made no changes to my phone that could have effected this. So after doing some digging around online and not finding any answers I contacted Samsung tech support who was terribly uninformed about their product and offered very little help with my problem. They suggested I go into the application manager and reset the application preferences. I was skeptical because I had spent a considerable amount of time disabling all the bloatware that was not needed in the past but I did take the advice of tech support and to my surprise it did get wifi working again.. temporarily that is.
Today I did the OTA 4.4.2 Kit Kat upgrade in hopes that it would fix my issue and to my shock and surprise it did. Wifi worked flawlessly for a few hours but then all the sudden earlier today it just shut off again without notice. Now once again, it will not turn back on no matter what I try. Im thinking this could potentially be a hardware issue. If it is then why after the upgrade to 4.4.2 did it work so well for a few hours?
Any help would be much appreciated as I have chewed through nearly all of my monthly data allocation while trying to find a working fix.
Thanks in advance!
Click to expand...
Click to collapse
I'm having the same problem. I upgraded to the KK 4.4.2 and now my WiFi won't turn on! I'm getting the Security notice that "Your phone's security has blocked an action that is not permitted. No further action is required." So, I went to the phone security tab to see what my settings were and it is set to Normal and the only other choice is High. So, I don't want to change that setting!

Both of you guys try flashing Ktoonz newest KK kernel for tw.. If that won't work there's also something to try to fix it in the OP, or you could also try that first
Sent from my SGH-M919 using Tapatalk

serio22 said:
Both of you guys try flashing Ktoonz newest KK kernel for tw.. If that won't work there's also something to try to fix it in the OP, or you could also try that first
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
Correct me if im wrong but your suggested fix would require root right?
I am running a stock unrooted rom
please help!

KingKash420 said:
Correct me if im wrong but your suggested fix would require root right?
I am running a stock unrooted rom
please help!
Click to expand...
Click to collapse
Right.. But other than that, the only other thing I can think of is to Odin the 4.4.2 firmware and see if that would fix it, if not then its likely a hardware problem
Sent from my SGH-M919 using Tapatalk