Develop Bugs

[Q] LOTS Of wlan_rx_wake And No Sleep For My Nexus

I recently performed a full wipe and installed the CM9 4/22 nightly, stock kernel, minimal apps in an effort to discover what was causing MASSIVE battery drain on my VZW SGN.
Using CPUSpy I can see my phone isn't going to sleep, and is staying awake @ 350 MHz for hours, but only when associated to my home (D-Link router) or work's (Cisco AP) 802.11n wireless. I am seeing a TON of Kernel Wakelocks caused by "wlan_rx_wake" via BetterBatteryStats, and this aligns to the overwhelming "Android OS" percentage of what is consuming my battery according to the native ICS app (settings -> battery).
According to the research I did, wlan_rx_wake is an event that wakes the kernel when a message is received via wifi, like a gmail push notification. Seems like something outside of my control. The weird thing is...i don't see these wake-ups on 4G. In fact the phone actually goes to sleep and gets better battery life when I'm NOT tied to wireless. What gives? Is the ROM doing something weird with the wireless? TIA for any advice, it's much appreciated.

Are you using a dynamic IP?

hittingsmoke said:
Are you using a dynamic IP?
Click to expand...
Click to collapse
yep, and i increased my DHCP lease times to 8 days.
i *think* i've discovered what the problem is, using WireShark and my HTPC sniffing out traffic to my wifi-joined cell phone. my router, issued by my ISP, is sending out "who-has" ARP requests to every IP address on my subnet, round-robin style. this is waking up my phone about 2x per minute.
i don't know if my ISP has enabled some ARP thing in the router (i looked in its config, can't figure out a way to disable the network scanning), or if the latest CM9 nightlies (i'm on 4/22) has suddenly decided to start responding to these requests...either way i've got to keep my phone on 4G to save battery. didn't have to do this a few weeks ago. very odd.

I experienced the same (along with wlan_ctrl_wake), and did quite a bit of experimenting: http://forum.xda-developers.com/showthread.php?t=1598581&highlight=cm9+wifi
Some wifi related commits, yet to be merged, 03:48 on May 5, maybe the new drivers will help: http://review.cyanogenmod.com/#/q/branch:ics,n,z
In the interim I either use another kernel, or use strictly data, I find the stock CM9 kernel doesn't drain excessively while on data. If you want to try another kernel instead, I'd recommend CM Plus Tuna; wifi drivers were reverted and a wlan_ctrl commit removed and there is no issue.

CMNein said:
I experienced the same (along with wlan_ctrl_wake), and did quite a bit of experimenting: http://forum.xda-developers.com/showthread.php?t=1598581&highlight=cm9+wifi
Some wifi related commits, yet to be merged, 03:48 on May 5, maybe the new drivers will help: http://review.cyanogenmod.com/#/q/branch:ics,n,z
In the interim I either use another kernel, or use strictly data, I find the stock CM9 kernel doesn't drain excessively while on data. If you want to try another kernel instead, I'd recommend CM Plus Tuna; wifi drivers were reverted and a wlan_ctrl commit removed and there is no issue.
Click to expand...
Click to collapse
Many thanks. I try to run the Franco kernel as well but still see the same issues. gonna just use cell data in the meantime till the wifi gets worked out in CM9

mcgoo99 said:
Many thanks. I try to run the Franco kernel as well but still see the same issues. gonna just use cell data in the meantime till the wifi gets worked out in CM9
Click to expand...
Click to collapse
Your issue sounds more app related possibly, since Franco has different wifi drivers than the stock CM9 kernel, unless he's updated them recently. Perhaps a nandroid and then a wipe (without restoring apps) to narrow it down.

CMNein said:
Your issue sounds more app related possibly, since Franco has different wifi drivers than the stock CM9 kernel, unless he's updated them recently. Perhaps a nandroid and then a wipe (without restoring apps) to narrow it down.
Click to expand...
Click to collapse
I don't think it is app related. I already wiped and installed base CM9, and with just two apps I saw the wlan wakes. I saw them on the Franco kernel as well. I'll try the Franco kernel once more and see if its been fixed.

mcgoo99 said:
I don't think it is app related. I already wiped and installed base CM9, and with just two apps I saw the wlan wakes. I saw them on the Franco kernel as well. I'll try the Franco kernel once more and see if its been fixed.
Click to expand...
Click to collapse
Same behaviour on all routers?
Sent from my Galaxy Nexus

CMNein said:
Same behaviour on all routers?
Sent from my Galaxy Nexus
Click to expand...
Click to collapse
i believe so. i found a new radio for the SGN posted on 5/1, gonna give that a shot, as well as the newest CM9 nightly, 5/7. if i continue to get wakelocks on wifi, i'm wiping and trying again...
EDIT: after wiping and installing JUST CM9 and 4/29 gapps, no apps other than BetterBatteryStats and CPUSpy, i still get a ton of wlan_rx_wakes show up, not allowing my phone to go into deep sleep and keeping it awake. meanwhile, my Samsung Galaxy Tab, running the same CM9 nightly, same gapps, same wifi network, and a TON of apps is sleeping like a baby. i have no explanation for this, and why it's specific to my phone only.

mcgoo99 said:
i believe so. i found a new radio for the SGN posted on 5/1, gonna give that a shot, as well as the newest CM9 nightly, 5/7. if i continue to get wakelocks on wifi, i'm wiping and trying again...
EDIT: after wiping and installing JUST CM9 and 4/29 gapps, no apps other than BetterBatteryStats and CPUSpy, i still get a ton of wlan_rx_wakes show up, not allowing my phone to go into deep sleep and keeping it awake. meanwhile, my Samsung Galaxy Tab, running the same CM9 nightly, same gapps, same wifi network, and a TON of apps is sleeping like a baby. i have no explanation for this, and why it's specific to my phone only.
Click to expand...
Click to collapse
the system restore process is PAINFULL, but here's the edited version. use these directions:
http://forum.xda-developers.com/showthread.php?t=1426207
with this file:
http://www.mediafire.com/?cnqab1sg2b1u93p
to use Odin to restore to 4.0.2 (windows only, sorry).
then reflash clockworkmod recovery, reflash new 4.0.4 radios, wipe EVERYTHING (factory data, cache, system, dalvik, battery stats - i'm doing it all just to be certain) flash CM9 nightly, flash gapps, then wipe again but no system this time (factory data, cache, dalvik, battery stats). reboot. log into the google acount but don't restore any apps, just install CPUSpy after accepting the Play T&C's.
phone sleeps on 4G. phone sleeps on wifi. i'm happy...for now will report back if anything mysterious happens.

I know this is old but I had the same problem with Cyanogenmod 9 Stable. If this bug is this old (and I actually remember having this problem on some of the early nightlys as well but never found a cause) then it's pretty sad they let it sit this long and then release the ROM as stable. Anyway I fixed it by flashing leankernel. That instantly stopped my wlan_rx_wake wakelocks and allowed my phone to deep sleep. Here's the thread I made on rootzwiki if interested
http://rootzwiki.com/topic/32175-cm9-android-os-keeping-phone-awake/

Old issue again, but this issue plagued my nexus 7.
I narrowed down my issue to a wireless HP printer as well. I disabled the wireless since I wasn't using it and my battery is back to normal.

I recently replaced a RoadRunner provided modem "2100" with a personal modem Motorola SB6141. Ever since my "wlan_rx_wake" is draining battery much faster than it use to. Same router (WRT54G). I did also change from Viatalk PAP2T to Ooma Telo phone service, so not sure if that's related. Also upgraded to android 4.3, so another variable. Nexus on Static IP as well as Ooma Telo. Not rooted.
Anything I can try to keep wlan_rx_wak down? (other than shutting off wifi). I use GrooveIP which needs wifi on. It doesn't look like it's the problem.

[Q] Slow wifi on CM9

Yesterday, i have unlocked and rooted my phone to put CM9 nightly on my galaxy nexus[GSM]. Everything works fine but i have one issue, the wifi speed is really slow on my phone.
this is the rom that i flashed on my phone.
http://forum.xda-developers.com/showthread.php?t=1398495
I have tested on speedtest.net and i am getting less than 0.5mpbs. I have looked over my router and other devices, they are getting 5mpbs. Is this an issue with CM9? On stock settings for the nexus i get 5mpbs.
Is there a fix around this?

What is your broadband connection rated at? 5/10/15/20...mbps? If you are rated at 15 or 20 and your only getting 5 on other devices you could have a router issues.
Does the speed get any better when you are within 5 feet of the router?
Do you have multiple Wireless Routers/AP's?

there is no difference if i am beside or 20 feets away from it. I still get less than 0.5 mpbs. There was no issue when i was using the stock version of GNexus 4.0.2.
I only have one router.
I have managed to fix the problem, can a mod please delete this thread?

I have the same problem. When I restore back to stock, the problem goes away. I do have the FD01 radio firmware installed.
Sprint GN, Tapatalk2

DTMLY said:
there is no difference if i am beside or 20 feets away from it. I still get less than 0.5 mpbs. There was no issue when i was using the stock version of GNexus 4.0.2.
I only have one router.
I have managed to fix the problem, can a mod please delete this thread?
Click to expand...
Click to collapse
How did you fix it? You could at least share it with all the people who tried to help

Hi folks
I was having the same problems. I just upgraded to 9-20120511-NIGHTLY-maguro and my wifi issues have gone.
Sent from my Galaxy Nexus using xda premium

Try rebooting your router. I've been using CM9 for weeks now and the only time I've had issues were with my router.
This isn't even the fastest.. just a random test. CM9 Nightly 5/11.
Sent from my Galaxy Nexus using Tapatalk 2

NCguy said:
How did you fix it? You could at least share it with all the people who tried to help
Click to expand...
Click to collapse
I have the same problem after I assigned my phone a static IP on my home router. Search on MAC randomization for this issue. There are several kernels that fix this. I believe Franco, Trinity, and Imoseyon will work. I wish the stock cm9 kernels would get fixed for this issue.
Sprint GN, Tapatalk

Do you have some sort of QoS setting on your router keeping it from providing the speed to certain devices or something like that? I agree with the others, first thing I would do is factory reset my router.

Having a similar issue my epic is doing 25mbps on a 30mb line but both of my gnexs on different roms are only getting g 10-12????
Sent From My Sprint Galaxy Nexus via XDA Premium

I've also noticed that my Wifi performance is seriously degraded and very slow. At first I thought it was my connection, but further testing narrowed the issue to my Gnex only. I get very long 1000+ms ping times using the speedtest app and get a stuttery 1-2mb/s down and up, when every other device in my house (6+) is showing upwards of 20mb/s down and 2mb/s up. I have replicated the horrible ping and download times from various wifi hotspots.
To test further, I reverted to a backup nightly with no change. I went back as far as my 04/29 build and the problem remained. Maybe I just didn't notice it before, but I'm not certain. I have even flashed other ROMs such as AOKP and speedtest showed superfast results.

bryanus said:
To test further, I reverted to a backup nightly with no change. I went back as far as my 04/29 build and the problem remained. Maybe I just didn't notice it before, but I'm not certain. I have even flashed other ROMs such as AOKP and speedtest showed superfast results.
Click to expand...
Click to collapse
Wonder what AOKP did to it because myself and many others finds wifi to suck on the stock roms.

The wifi problem goes away when i use a kernel that addresses MAC randomization.
Sent from my Sprint Galaxy Nexus CDMA using Tapatalk 2

Figured out the cause of the slow wifi
I found out what the issue was with my wifi slowness and awful ping times.
I re-installed the latest Nightly and this time I did a "wipe data" (wiping out all of my apps) and my speedtest results were awesome again. Essentially a clean install. After reinstalling my apps one by one, I've been running speedtest each time and found that Doubletwist/Airsync was the cause of my slowness. Uninstalling DoubleTwist/AirSync and then rebooting fixed the speed/ping issue right away. HTH.

bryanus said:
I found out what the issue was with my wifi slowness and awful ping times.
I re-installed the latest Nightly and this time I did a "wipe data" (wiping out all of my apps) and my speedtest results were awesome again. Essentially a clean install. After reinstalling my apps one by one, I've been running speedtest each time and found that Doubletwist/Airsync was the cause of my slowness. Uninstalling DoubleTwist/AirSync and then rebooting fixed the speed/ping issue right away. HTH.
Click to expand...
Click to collapse
You could also try AirDroid (https://play.google.com/store/apps/details?id=com.sand.airdroid) as an alternative to upload/download files to your phone.
Works great for me ^_^

[Q] Phone randomly reboots with Calkulin's ICS rom

Hey guys,
I've clicked around a bit but can't seem to find anyone with the same issue, and I went through about 40 pages on Calkulin's ROM but I really don't want to go through all 200 and some if somebody here can provide a solution.
I've used his ROMs for the past year, really fantastic, no complaints at all. I flashed his beta ICS build a few months ago and it worked well with the exception that it would randomly reboot for no apparent reason. I could be in the middle of a text message or it could be sitting on my desk and all of a sudden, reboot. I went back to his old ROM and decided to put off ICS for a few months to work out the bugs. Today I put his newest ICS ROM up and once again, random reboots. It doesn't seem that others are having the same problem so I'm not sure what to make of it. And for the sake of putting it out there, it's always a clean install - Format All, flash modem and ROM.
Anybody have any ideas? Suggestions? Any help is seriously appreciated.
Thanks guys.

Ive heard of someone else having this issue before have you tried a fresh install with a new download of EL29 or EL26? When i have had issuez in the past that could be the culprit try a new download also you could try one of the new kernals posted that may help as well.
Sent from my SPH-D710 using XDA

Are you using 4g?? This is a known issue with leaving 4g enabled.
Sent from my SPH-D710 using XDA

It is a known issue that if the hacked Hotspot is installed and you are running on 4G that you will experience random reboots. Mijjah74 has implemented a fix for it in his ROMs and it is beginning to go out among the other developers as well.
Until your developer implements the fix the cure is to not use 4G.

Awesome, thanks a ton. What a goofy bug. Yes I frequently use 4g, hourly even, and although I rarely use the hot spot, it is installed. I wonder if un installing it would fix the issue.
Thanks again.
Any idea if using am older modem would fix it?

iJoshh said:
Awesome, thanks a ton. What a goofy bug. Yes I frequently use 4g, hourly even, and although I rarely use the hot spot, it is installed. I wonder if un installing it would fix the issue.
Thanks again.
Any idea if using am older modem would fix it?
Click to expand...
Click to collapse
No, reinstalling won't help. I was testing 4g for this and (for me at least) it would reboot at about exactly the 1 hr mark if 4g is running constantly. Pretty strange but it did it several times in a row that way. I think someone said that they have the timing down pretty well and I can't recall exactly what the recommendation was, turn 4g off and back on right before it's going to reboot (you should time yours to see when it does it). Something like that.
Addendum: FYI, I'm running stock EL29 modem. A different modem won't change the 4g reboot issue either, sorry.

I had random reboots on every ROM. I went all the way back to stock unrooted, and started back over. Haven't has any issues since.
Sent from my SPH-D710 using xda premium

[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:

WiFi behaving erratically

Hey Guys,
lately my wifi is been acting strange, I have full signal when the phone is idle but the minute I start using it the signal drops to a 1-2 bars or just that dot.
There are times it just disconnects from WiFi and connects after a brief moment with full signal. I am noticing this behavior when I do something WiFi intense. How can I get to the root of this problem?
I am currently rooted, running MMuzzy ROM with Trinity kernel. (I tried stock kernel too and it acted the same)
Any help appreciated.
Thanks

Have you installed the latest radio? :S might be best to do a clean install (google image)
edit: You should try with different kernels aswell it might be possible that trinity isn't acting well with your phone not that i'm bad mouthing trinity .

I'm on the latest radio, I tried various kernels and they all act the same.
I'll have to give Google's image a go.
Sent from my Galaxy Nexus using xda app-developers app

Remember to backup everything hope it goes well,

So it went well?