Develop Bugs

[Q] wifi "avoided poor internet connection", screeoff kills connection

im trying for a week now to get around an issue that is costing me my nerves and renders my phone useless, especially on travel without roaming and data-plan. after screenoff my nexus kills the wifi connection, after some time though, 30 minutes, 1 hour, it seems to change. my company uses skype as the primary means to communitate and i'm just cut off, won't receive important mails, messages, whatever.
when i switch my phone back on wifi starts up again, if im quick enough the settings reveal "avoided poor internet connection" in the hotspots status. so basically it looses the signal for a moment and is not able to connect back on its own. i read 4.0.1 had a setting to circumvent that but since 4.0.2 it's gone. of course keep-alive-during-sleep is checked to "always" in the settings and i tried just about anything, changing basebands, factory resets, cache wipe, etc. nothing helped. the weirdest thing i that the battery stats to not reflect it, the blue wifi line is uninterrupted all the way.
i searched and found dozens of people complaining about this but no solution anywhere. they switched phones and had the same problems still. from little fragments i collected it seems that samsung devices had this issue before, cm7 supposedly fixed a hardware driver that had issues with certain wifi devices on certain frequencies.
im on AOKP b27 now (powersaver on or off with setting to untouched or "leave on" made no difference), leankernel, xxkl1 baseband. today i went back to stock 4.0.2 to see if that does something. still, has anyone here similar problems and maybe even solutions? what about the cyanogens "nexus one sleep fix" i read about, anyone can provide links or informations?

Did you try settings - wifi - menu - advanced - keep wifi on during sleep - always
Sent from my Galaxy Nexus using xda premium

Try changing that setting. I know 2.x defaulted to turn wifi off during sleep but I thought they changed that in ICS. Either way that sounds like the problem.

its not that setting, it's the first thing i checked. it's set to "always" and it should never kill wifi in theory. from what i have read by now it seems more of a wider problem, a software or hardware related issue affecting all nexus devices. most people don't know about it since it only fails for certain routers having certain settings (which other phones digest without problems though). i also never knew it until i had to stay one month in a place with a wifi-hotspot my phone doesn't like. my gf's s2 has no problems at all, neither have our laptops.
here on xda people have switched their devices because of that problem, got new ones and the problem persisted. i have installed roms, kernels, stock-images, basebands, nothing helped and i am sure the problem won't go away if i exchange the device. i knew i'd probably not gain much by asking again, threads like this can be found here, on rootzwiki, google, etc., but i was hoping to gather a little more knowledge. to read about cm7's patch for a similar issue on the nexus one gave me hope that something must be out there ...
btw, stock ICS seems to have the best reception by now, it stays connected for hours. but once it looses it, it won't re-connect aswell. my experiences are worse with AOKP. and it sucks because i love that rom so much. i guess when i'm home again it wont bother me since my own wifi is okay - but man, here, in another country it really hits me.

i had the same problem, seems like the connection would drop when the wifi signal is weak regardless of what settings you choose. i saw this problem on 4.01 and 4.02 stock, and apex rom. i had to switch to a router that could broadcast a stronger signal. i would get about 80-90 dbm with the old router and the new gone give 60-70 dbm. it seemed to have fixed the problem, i havent seen my gnex drop the wifi since i got the new router a few weeks ago.

Ive heard some people have a bug with wifi sleep policy setting not working. But mine seems to actually work. Set to "never" is the best choice and after hours of screen off my wifi is still connected.
Maybe try that setting a few times to kill the bug.

“never"should actually kill wifi immediately after screen off I think. If it doesn't that would be just another bug. I read somewhere that for some people setting it to never resolved the issue but i tried pretty much every setting by now, nothing worked out though. I became so desperate I installed wifi monitor apps that reset wifi after they figure it got dropped, but not even these patches could revive it in some occasions. The only thing that works for sure is switching on the screen every now and then.

It's a wifi sleep policy. So never = never sleep.

Weird, mine says "keep wifi alive during sleep": always, when plugged in, never. our I miss something and there's another setting I haven't tried yet.

this may fix ur problem... for rooted phone
http.s://play.google.com/store/apps/details?id=co.in.zextr.wcf&hl=en
Click to expand...
Click to collapse

do you have " avoid poor connections" unchecked?

martonikaj said:
It's a wifi sleep policy. So never = never sleep.
Click to expand...
Click to collapse
How do you get that? It says "Keep Wi-Fi on during sleep", which implies "never" would always keep the Wi-Fi off during sleep.

[Q] losing wifi connectivity- full bars but all gray

so, I've read around here on the XDA forum about problems with wifi connectivity where we have full bars for wifi but they are gray and you are not getting out. many describe my situation but I've not seen any real solutions...
my problem is that I can connect to my wifi router without issue but then a random amount of time later, sometimes fairly quickly and sometimes it's hours later, I will pick up the phone and see full bars but they are gray and I'm not getting out. I can try opening a terminal window and pinging the gateway/dns servers and can't even reach the gateway.
things I have tried:
- turned off MAC filtering on the wifi AP
- switched from a 5 GHZ wifi on the AP to 2.4 GHZ net on the AP and vice versa
- manually set the phone wifi preference to one or the other (5 or 2.4)
- battery pull on the phone
- delete network settings for my AP and reconfigure
I have not yet tried a static IP config on the phone but I can easily try that... {edited to add} well, I tried static config and that didn't help at all...
one other tidbit of info, I have a work Blackberry with wifi and it never loses wifi connectivity so this is a problem unique to my Nexus.
I'm running Cyanogen 10.0.0-toro and no, I haven't tried a full wipe and reload yet.
thoughts or suggestions?

I'm not trying to threadjack here, but I just wanted to share my experiences.
I've been have the exact same thing happen to my phone (Nexus maguro). I've tried every JB rom I could find, several different kernels and my wifi eventually always goes grey on me. All network activities stop. I'm back on stock everything right now and it still happens.
It happens on my home wifi as well as work wifi.
I'm about to puttstock ICS on my phone and try that out for a couple days.
Anyway, good luck with your problems, i'm going to follow this thread in hopes you'll get a solution that may help me.
If I do figure anything out i'll post back.

jrmacarthur said:
I'm not trying to threadjack here, but I just wanted to share my experiences.
I've been have the exact same thing happen to my phone (Nexus maguro). I've tried every JB rom I could find, several different kernels and my wifi eventually always goes grey on me. All network activities stop. I'm back on stock everything right now and it still happens.
It happens on my home wifi as well as work wifi.
I'm about to puttstock ICS on my phone and try that out for a couple days.
Anyway, good luck with your problems, i'm going to follow this thread in hopes you'll get a solution that may help me.
If I do figure anything out i'll post back.
Click to expand...
Click to collapse
seems that this is a topic that has been posted on a bit over time with no real single culprit or fix. I'll post back if I figure anything out... I know in the Cyanogen thread, I saw info that stated that the MAC address of the phone was changing and I'm going to try and determine if that is happening to mine.

I have the same issue. Sometimes even when i pick up the phone, if i look fast enough i see that the Wi-Fi bars weren't even there! Thats only 1 out of 5 times though. The other time its usually just grey bars. Sometimes it actually will click back and they'll flash to blue and grey 2-3 times and then go solid blue. Then sometimes like you, they'll stay grey. I've tried everything too...reverting to stock, Different kernels, ROMs, routers, static IP, 2.4 or 5ghz, full auto mode. The only fix that makes it a little more reliable, is using Wi-Fi PM Fast. But even that, is not reliable. I'd say its about 50% reliable then, for a huge sacrfice in battery life. For me i've noticed this started to happen with 4.2. Before that i never had a problem. All other devices though no problem. My Nexus 7 is just fine. But the galaxy nexus, no matter what router or where i am, the Wi-Fi is totally unreliable. For me, it happens within 2 minutes that it will disconnect most times. Then 1 in 10 times it'll be fine for 10 hours.
In all honesty, i've given up. Just come to deal with it. Use mobile networks when i'm not needing to download. I can download files and stream music just fine too. If there is traffic going through, it never disconnects. But when its just sitting there without traffic, it disconnects, or, loses connection to google servers i should say.

well that's not good to hear...

I installed stock 4.0.4 a couple days ago and have not had my wifi go grey on me yet.
Sent from my Galaxy Nexus using Tapatalk 2

jrmacarthur said:
I installed stock 4.0.4 a couple days ago and have not had my wifi go grey on me yet.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
yeah, I love Cyanogen so not willing to go back to stock... waiting for them to finish 10.1 and I guess I'll see how it behaves then.

Hi all,
Just to say that I have the same problem. I have been upgraded from ICS to 4.2 and nothing had happened but I had to downgrade to 4.1.1 (AOKP Build 4) due to other issues and after that I started notice the WiFi problem.
At first I thought it was when the screen went off, but I has happened with screen on too. I have to turn WiFi off and the back on to connect properly again, very annoying.
As I said I started noticing this after I downgraded, but then again, I had used AOKP 4.1.1 before without this issue. I think that it is time to change my phone :/

tgeery said:
so, I've read around here on the XDA forum about problems with wifi connectivity where we have full bars for wifi but they are gray and you are not getting out. many describe my situation but I've not seen any real solutions...
my problem is that I can connect to my wifi router without issue but then a random amount of time later, sometimes fairly quickly and sometimes it's hours later, I will pick up the phone and see full bars but they are gray and I'm not getting out. I can try opening a terminal window and pinging the gateway/dns servers and can't even reach the gateway.
things I have tried:
- turned off MAC filtering on the wifi AP
- switched from a 5 GHZ wifi on the AP to 2.4 GHZ net on the AP and vice versa
- manually set the phone wifi preference to one or the other (5 or 2.4)
- battery pull on the phone
- delete network settings for my AP and reconfigure
I have not yet tried a static IP config on the phone but I can easily try that... {edited to add} well, I tried static config and that didn't help at all...
one other tidbit of info, I have a work Blackberry with wifi and it never loses wifi connectivity so this is a problem unique to my Nexus.
I'm running Cyanogen 10.0.0-toro and no, I haven't tried a full wipe and reload yet.
thoughts or suggestions?
Click to expand...
Click to collapse
I'm on Muzzy 4.2.2 and I'm currently having the same problem. It's not a new problem since I remember having it months ago (disabled my phone's WiFi because I kept missing emails and other notifications - grew tired of dealing with it). I thought it was my router, so I swapped it with a newer one recently, but it carried forward (old router was TRENDnet Draft N and the new one is ASUS RT-N66U).
I would like to know how to properly troubleshoot this problem.

I'm glad I didnt have to create a thread for this. I have been facing this problem quite a lot. I can confirm that WiFi works absolutely fine until 4.1.2, whether it is stock or CM10 (I havent tried the other ROMs yet). I have faced this problem only from 4.2. It still exists on 4.2.2. Happens on all the ROMs I have tried till now including CM10.1 nightly as well as the stock factory image.
When the phone is sleeping, it seems to lose WiFi connectivity and when woken up, the WiFi bars is grey though it is full. If I am very lucky, it will turn blue automatically. Most of the times, I have to switch WiFi off and back on for it to connect properly.
Anyone knows the root cause for this? In case this has been discussed in any other thread?

subhramani said:
I'm glad I didnt have to create a thread for this. I have been facing this problem quite a lot. I can confirm that WiFi works absolutely fine until 4.1.2, whether it is stock or CM10 (I havent tried the other ROMs yet). I have faced this problem only from 4.2. It still exists on 4.2.2. Happens on all the ROMs I have tried till now including CM10.1 nightly as well as the stock factory image.
When the phone is sleeping, it seems to lose WiFi connectivity and when woken up, the WiFi bars is grey though it is full. If I am very lucky, it will turn blue automatically. Most of the times, I have to switch WiFi off and back on for it to connect properly.
Anyone knows the root cause for this? In case this has been discussed in any other thread?
Click to expand...
Click to collapse
have you posted this information over in any of the threads where the developers are working such as Cyanogen in an effort to bring this issue to the forefront for more visibility?

I have had those wifi problems with every android version and rom I had on my GNex as far as I can remember.
Sometimes it will be able to reconnect but sometimes I have to disable and re-enable wifi to get it back.
I too thought that it might have been my crappy router as I have had multiple problems with it over the years (some Linksys router).
This is really annoying because it won't receive any e-mails until I randomly decide to have a look at my phone. :/

Fabur87 said:
I have had those wifi problems with every android version and rom I had on my GNex as far as I can remember.
Sometimes it will be able to reconnect but sometimes I have to disable and re-enable wifi to get it back.
I too thought that it might have been my crappy router as I have had multiple problems with it over the years (some Linksys router).
This is really annoying because it won't receive any e-mails until I randomly decide to have a look at my phone. :/
Click to expand...
Click to collapse
trust me, I understand your frustration... some days, I can go almost all day without loosing wifi data throughput and other days it won't last 10 minutes without going to gray bars.
unfortunately, no one is sharing any fixes which tells me that no one has a good handle on the problem.

Same issue for me on stock Android 4.2.2. Leave WiFi on overnight and when I wake up its connected to WiFi but gray bars...
Sent from my Galaxy Nexus using xda premium

The update to 4.2.2 drivers have fixed all WiFi issues for me. For the first time since 4.1 I can now use WiFi optimization now. And WiFi is fully reliable.

tgeery said:
so, I've read around here on the XDA forum about problems with wifi connectivity where we have full bars for wifi but they are gray and you are not getting out. many describe my situation but I've not seen any real solutions...
my problem is that I can connect to my wifi router without issue but then a random amount of time later, sometimes fairly quickly and sometimes it's hours later, I will pick up the phone and see full bars but they are gray and I'm not getting out. I can try opening a terminal window and pinging the gateway/dns servers and can't even reach the gateway.
things I have tried:
- turned off MAC filtering on the wifi AP
- switched from a 5 GHZ wifi on the AP to 2.4 GHZ net on the AP and vice versa
- manually set the phone wifi preference to one or the other (5 or 2.4)
- battery pull on the phone
- delete network settings for my AP and reconfigure
I have not yet tried a static IP config on the phone but I can easily try that... {edited to add} well, I tried static config and that didn't help at all...
one other tidbit of info, I have a work Blackberry with wifi and it never loses wifi connectivity so this is a problem unique to my Nexus.
I'm running Cyanogen 10.0.0-toro and no, I haven't tried a full wipe and reload yet.
thoughts or suggestions?
Click to expand...
Click to collapse
same thing happened to me on toroplus sourcery 5.1, after trying everything i could think of and talking to one of the devs, i finally did a fresh download of rom and gapps. wiped cache,wiped dalvik, factory reset, wipe system, deleted android folder off of storage then installed the fresh download of rom and gapps and its been working great for me since. hope this helps.

M3drvr said:
The update to 4.2.2 drivers have fixed all WiFi issues for me. For the first time since 4.1 I can now use WiFi optimization now. And WiFi is fully reliable.
Click to expand...
Click to collapse
Can you elaborate on this? I've flashed 5 different modems and still get this problem... it happens to my cell service bars, as well. Would love to know what the cause is.

aqcon said:
Can you elaborate on this? I've flashed 5 different modems and still get this problem... it happens to my cell service bars, as well. Would love to know what the cause is.
Click to expand...
Click to collapse
i just know ever since moving to a 4.2.2 kernel that has the 4.2.2 drivers my wifi has been stable. I know there was a post in the anarkia thread with the ak kernel that had the drivers. but i believe most any 4.2.2 kernel would have them implemented. i do have the newest bootloader and radio too. but i know as soon add i got the 4.2.2 drivers all issues were resolved wifi wise. of course i think if you have a 4.2.2 kennel you'll have them.

M3drvr said:
The update to 4.2.2 drivers have fixed all WiFi issues for me. For the first time since 4.1 I can now use WiFi optimization now. And WiFi is fully reliable.
Click to expand...
Click to collapse
I'm looking forward to that update - I've been watching the Cyanogen threads for when I think the 10.1 has matured enough to become my daily driver... good to know you've had positive results!

Temporary solution
me facing same issues , Solution would be to use an app called wifi fixer by zanish-g1 from the play store ...
it worked for me !! :good:

Data and WiFi Constantly Dropping

Both my data and WiFi have been acting very strange the past week. Both services will show me as connected but I will only get the upload arrow showing on each indicator and then sometimes the icons just go gray. It has been happening very often and I have changed both my ROM and kernel on clean installs and I still have the same issue. Any help would be appreciated.

Bump. Still have the problem.

Flashing back to stock should work
Posting your basics usually gets you better answers
Sent from my Galaxy Nexus using Tapatalk 2

czonin said:
Both my data and WiFi have been acting very strange the past week. Both services will show me as connected but I will only get the upload arrow showing on each indicator and then sometimes the icons just go gray. It has been happening very often and I have changed both my ROM and kernel on clean installs and I still have the same issue. Any help would be appreciated.
Click to expand...
Click to collapse
I started a thread here on a topic where my wifi and signal bars turn gray and the phone doesn't have data connectivity any more. sometimes this happens a dozen or more times a day and sometimes once or twice.
one response in that thread indicated that 4.2.2 made a positive impact on the problem.

I've been searching for a definite fix for this data/WiFi issue to no avail. I'm not entirely sure of when this issue began to occur but my phone (Toroplus) constantly loses WiFi signal. By losing signal I mean WiFi will turn off and on all by itself. And yes, WiFi sleep policy is set to stay on always. This issue alone made me go back to stock only to find the WiFi issue is present there too. I've also ruled out my router as the culprit. Im suspecting this is a Google issue. By the way, I talked to a sprint store employee who owned a galaxy nexus and after a few minutes of playing with his phone, which was completely stock and never rooted, I noticed his WiFi connection would turn off and on all by itself too. Any insight from anyone with knowledge to this would be appreciated.

Wi-Fi optimization off. If that does not fix it, I dunno.
Sent from my Galaxy Nexus using xda premium

Soldier 2.0 said:
Wi-Fi optimization off. If that does not fix it, I dunno.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Thanks for the suggestion but that doesn't fix it. Are you not having this issue? What's your setup? What ROM do you use? I've basically used all of them and it never goes away. I'm thinking of going to the HTC One when it's released just in case it's a Samsung issue.

I have also experienced this problem, especially at work where the network uses some WPA Enterprise variant. I've digged through logcats and can't find the problem either. A few Google Code forum posts talk about a possible bug introduced by network adapter manufacturers, or wpa_supplicant configuration issues. Haven't found a workaround yet, so I had to go back to 4.1.2, which seems to be stable.
More info here:
http://code.google.com/p/android/issues/detail?id=34212
http://code.google.com/p/android/issues/detail?id=40023

The more I read on this subject the more I come to realize this is not specific to a certain device. The only common denominator that jumps out at me is jellybean. Seems like the issue is with Google, not hardware. Sucks that such a basic feature is not reliable out of the box. At least now I can understand why my buddy calls Android "buggy". Hopefully this is fixed sometime in the near future.

[Q] Android 4.3 wifi problem

I know this has probably been asked many times before but i can not find an acceptable answer. My WiFi will not automatically connect to known WiFi spots i know they are solutions to try like turning wifi optimisation on/off and you can always manually go into wifi and it will connect, but its not right it is not how it should work. I'm wondering if it is linked to hardware as in a certain batch of components not working properly with the software. Anyway is there a permanent proper fix other than flashing back to an early release. Also I have tried many 4.3 roms including stock and they are all the same

Tasker Fix
goatimus said:
I know this has probably been asked many times before but i can not find an acceptable answer. My WiFi will not automatically connect to known WiFi spots i know they are solutions to try like turning wifi optimisation on/off and you can always manually go into wifi and it will connect, but its not right it is not how it should work. I'm wondering if it is linked to hardware as in a certain batch of components not working properly with the software. Anyway is there a permanent proper fix other than flashing back to an early release. Also I have tried many 4.3 roms including stock and they are all the same
Click to expand...
Click to collapse
Had the same issue. Having success with a Tasker rule that turns off wifi for 1 minute when wifi connection is lost and then turns it back on. This seems to reset the wifi so when I return to a known wifi, there is a reconnect. At wost have to wake the device (hit the power button) and then wifi comes alive.

bigknowz said:
Had the same issue. Having success with a Tasker rule that turns off wifi for 1 minute when wifi connection is lost and then turns it back on. This seems to reset the wifi so when I return to a known wifi, there is a reconnect. At wost have to wake the device (hit the power button) and then wifi comes alive.
Click to expand...
Click to collapse
Thanks for help I've decided to go back to 4.2 for now. It really bugs me when something doesn't work as it should and refuse the 'workarounds' as a matter of principle. Does anyone know though if it is a hardware batch kind of problem as it just doesn't seem to make sense that some people have the problem where others do not. I hope 4.4 doesn't have the same issue.

goatimus said:
I know this has probably been asked many times before but i can not find an acceptable answer. My WiFi will not automatically connect to known WiFi spots i know they are solutions to try like turning wifi optimisation on/off and you can always manually go into wifi and it will connect, but its not right it is not how it should work. I'm wondering if it is linked to hardware as in a certain batch of components not working properly with the software. Anyway is there a permanent proper fix other than flashing back to an early release. Also I have tried many 4.3 roms including stock and they are all the same
Click to expand...
Click to collapse
Having the same issue here on my toroplus. I've noticed three different behaviors: automatically connects, connects right after screen turns on (before unlocking), and doesn't connect until I tell it to "Connect". I've read that some people have reported the issue on the Nexus 4, but I don't know if that means anyone is working on fixing it...but being on multiple devices, someone that can fix it ought to notice it, right? I hope so; it's definitely starting to annoy me too!

Its annoyed me to the point I think 4.3 is unusable. I have limited data usage and with my very useless memory I keep using it up as I've forgot to manually connect to WiFi. I've even tryed looking through all the system folders to see if I can edit some setting but I don't really know what I'm looking for.
Sent from my Galaxy Nexus using XDA Premium 4 mobile app

Recently tried 4.3 again with the same problems as usual. Buuuut after a week of using it the WiFi issue seems to be fixing itself!?!?! More and more often its connecting by itself yet I have not changed a single thing. I am on stock unrooted 4.3. So maybe its just a case of a bit of patience.
Sent from my Galaxy Nexus using XDA Premium 4 mobile app

No, I can't confirm that. I've been using 4.3 for at least 2 months and the issue hasn't fixed itself the least.

CM11, random data blackout

Hoping this might ring a bell with anyone who has fiddled around with the GN and CM11.
The CM11 update notification won me over and I pushed CM11 (11-20140308 snap - toro) a few weeks ago.
Interestingly enough I saw a HUGE battery drain improvement. Possibly an oddity unless others have noticed this too.
Anyway, the big issue when using CM11 is random data blackouts. The phone can be on 3G, 4G, or Wifi and it will act like there is no data access. eBay app and Chrome give the 'no connection' type error with other things like email just not updating.
The fix so far is to reboot the phone. As soon as it comes back up the data portion works perfectly. Not the most time effective solution especially if trying to get important data on the go.
I know Google has marked this phone as past it's prime in terms of support, but with CM still supporting builds for this device I'm hoping something may sound familiar and somebody could give some words of wisdom for this problem. With the Nexus 6 device slotted to be released in the summer/fall timeframe I'm holding out on replacing the GN.
Ideas anyone?

change other kernel/boot.img
Sent from my Galaxy Nexus using XDA Premium 4 mobile app

well yes but I was also interested if anyone else may have been experiencing this.

if this is the same issue I've seen in some ROM threads then yes you aren't alone.
instead of doing a reboot, have you tried toggling airplane mode on then off? if that works, you'll spend way less time vs waiting for boot up

glad to know I wasn't alone on this one!
The 'no network found' issue just came up a minute ago. Probably had tried the airplane mode before but in a hurry I defaulted to restart.
The quick switch between AP mode and back did bring the connection back, although with the phone starting up fairly quickly the different between doing AP mode or restarting seems to be differently by only a second or two.
If this has been seen with some ROMs, what have people turned to as an alternative?