Develop Bugs

[Q]Problems with WiFi and screen off?

Does anyone else have issues with the WiFi connection while the screen is turned off? I noticed that not a single one of my music streaming / radio apps work when the screen isn't on. It works for maybe a minute before all sound just stops. Starts just fine again once I power up the screen.
Has there been any changes done to the handling of these matters in ICS perhaps?
Pretty annoying not being able to stream music over WiFi as I think I'll hit my 5GB limit on data pretty fast if I can't use the WiFi at work for this.
So has anyone else noticed these issues?

SBS_ said:
Does anyone else have issues with the WiFi connection while the screen is turned off? I noticed that not a single one of my music streaming / radio apps work when the screen isn't on. It works for maybe a minute before all sound just stops. Starts just fine again once I power up the screen.
Has there been any changes done to the handling of these matters in ICS perhaps?
Pretty annoying not being able to stream music over WiFi as I think I'll hit my 5GB limit on data pretty fast if I can't use the WiFi at work for this.
So has anyone else noticed these issues?
Click to expand...
Click to collapse
Yeah same here. I remember this being an issue with Android 2.1 for my Desire but was fixed in custom roms. Might be the same situation here again.

I remember this being an issue with my Nexus One, don't remember if it was fixed in 2.2 or 2.3. I remember testing file transfer using SwiFTP, with the bug the file transfer would go down to double digits (kB/sec), with the bug fix it would be a few hundred kB/sec, with the screen on it would hit mB/sec or so (in any Android version).
I believe this is the official issue:
http://code.google.com/p/android/issues/detail?id=9781
With my Nexus S I'm not experiencing this bug. Sscreen on still gives me a major wifi speed boost, but screen off I get a few hundred kB/sec, which should be more than enough for any streaming app. KiloBYTES btw, not bits. I'm surprised ICS and/or Galaxy Nexus brought this problem back. Or it could be something else entirely.
Are you connected via 2.4GHz or 5GHz wifi? I would think the new 5GHz radio in the GN probably has more aggressive power saving features. Try switching to 802.11b/g (instead of 802.11n, in any frequency), see if it helps.

Have you changed your WIFI sleep policy?
On my Froyo phone, if you hit menu while in the WIFI settings (I know there is no menu in ICS) you get an option to go into advanced settings where you have the option to choose your WiFi sleep policy (When screen turns off, never when plugged in, never).
There should be a way to access that advanced settings area somewhere.. My phone is a couple hundred miles away right now and I won't see it for another week so I can't be of much further help right now. However, there "was" a setting in previous versions.

best info at the time last year was here for the N1
http://www.google.com/support/forum/p/android/thread?tid=01a47ff5b0a92d52&hl=en
7xx replies there to read, but really good info. somewhere in there, maybe around#600 the info gets good, can't remember. But shortly around this time the problem was gone/fixed.
there was a guy with an app i think it was wifi fixer, i could be wrong. that worked sometimes, but battery drain was bad. Whatever google, or CM did fixed the low power save mode issue. I'm thinking it was something at the kernel level?
edit, on second thought, there's no good reason to read all that. You won't get a fix out of it anyway. It was updated away in the end, something related to MAC addresses and build numbers and frf50 or some such.
BUT this seems like the same kind of thing going on in the power save mode.

Have you checked your advanced settings?
Wi-Fi>>(settings [bottom right])>>Advanced>>Keep Wi-Fi on during sleep...
Mine was set to always by default, so I suspect that the issue lies else where...

Neville.Holland said:
Have you checked your advanced settings?
Wi-Fi>>(settings [bottom right])>>Advanced>>Keep Wi-Fi on during sleep...
Mine was set to always by default, so I suspect that the issue lies else where...
Click to expand...
Click to collapse
Same here. Mine was set to always by default but still getting this issue.
Sent from my Galaxy Nexus using XDA App

I would suggest that this issue is related to the individual applications you are using, rather than anything to do with Android.
I am able to stream music from Google Music via WiFi just fine when the screen is off, and I am also able to talk to someone on Skype via WiFi just fine when the screen is off.

oscillik said:
I would suggest that this issue is related to the individual applications you are using, rather than anything to do with Android.
I am able to stream music from Google Music via WiFi just fine when the screen is off, and I am also able to talk to someone on Skype via WiFi just fine when the screen is off.
Click to expand...
Click to collapse
Thanks for posting that; I was getting pretty worried and disappointed after reading this thread. I had to deal with this when I first got my Nexus One, until Google released the 2.2.1 update with a new Broadcom driver which finally fixed the issue. No streaming, no pushes, just nothing at all from wifi when the phone went to sleep. All traffic to/from the phone would just stop. It was maddening.
The Galaxy Nexus comes to Canada a week from today, and this would've been a show-stopper for me. At least it's working for you, so my day isn't ruined quite yet

Has this issue ever been nailed down? I've seen considerable discussion on it going back years. I've seen considerable speculation regarding WIFI mode and Governor. I've seem many of the bug reports marked closed.
Yet I have a GN on v4.0.4 and the moment the screen goes off - either because you turn it off or it just times out - the WIFI goes to h*ll. I've run ping and network trace from both sides and there is no doubt the WIFI stays connected, however latency goes way up and packets are lost... and with TCP connections it gets congested with retransmits. I've run with the governor set to "Performance" and there is no difference.
So, is there any consensus on what is causing this problem with current stock hardware/software?

I read that it's something that's been coded in for a while. Try using this:
https://play.google.com/store/apps/details?id=com.ratcash.wifiperf
-Sent via XDA Premium-

Ok, to answer my own question, this is still related to the PSP issue from years ago:
code.google.com/p/android/issues/detail?id=9781
code.google.com/p/android/issues/detail?id=15549
Bottom line is that some hardware - like GN - has an additional level of PSP on WIFI. The issue was resolved by inclusion of an additional lock mode - WIFI_MODE_FULL_HIGH_PERF - some time ago. However, its up to an application to request the new lock state if it thinks it needs it. Many don't.
So, its probably not a bad idea to contact developers of the various applications and recommend they look into the new lock level in the later APIs.
Also, the "WIFI High Performance Widget" can be used to manually hold a WIFI_MODE_FULL_HIGH_PERF lock on the WIFI if you're dealing with an application that isn't doing it its self. Beware of the other "WIFI fixes" out there, none of the ones I tested were acquiring the correct lock.
Also, from an adb shell you can use "dumpsys wifi" to see who is holding what lock, for example:
Code:
Locks acquired: 5 full, 5 full high perf, 5 scan
Locks released: 4 full, 4 full high perf, 5 scan
Locks held:
WifiLock{PANDORA type=1 [email protected]}
WifiLock{HighPerformance type=3 [email protected]}
Here you can see Pandora is only holding type=1 (WIFI_MODE_FULL) and HighPerformance is holding type=3 (WIFI_MODE_FULL_HIGH_PERF). Dumping the WIFI state takes the guess work out of it.

Tried that widget, having absolutely no luck with 'in tune' and 'winamp' for radio with the galaxy nexus verizon...
as soon as the device sleeps, wifi goes to hell and buffer drops in and out every 2 seconds. Completely unusable, any recent fixes? this is totally making me think I just bought a $400 brick since this feature was very important for me.

What may be confusing about that widget is that it is a "widget". You have to locate it under "widgets" and then put it on the surface and then click it to enable it... it should be blue when on, and black when its not.

tlum said:
What may be confusing about that widget is that it is a "widget". You have to locate it under "widgets" and then put it on the surface and then click it to enable it... it should be blue when on, and black when its not.
Click to expand...
Click to collapse
I have been trying to put the 'widget' itself (2x2 square) on the home screen but even if i hold and drag it to where I want it, it never actually appears on the screen. And of course i'm still getting crazy ping times...Does anyone else have this working on a GN (verizon - not that it should make a difference)?
I have found a few workarounds to this issue, none are great and frustrate me greatly.
1. Root and use the franco kernel. Seems people with that have no issues - since you can set? the wifi to full performance.
2. Use this wifi performance widget
3. Use an app that has properly set its own wifi settings. - Going through all the radio apps on the google market, i am finding only one app that seems to be doing this right: DI Radio - some kind of dance/techno/etc - confirmed it with ping times, they remain low on sleep.
Not one other radio app seems to have set 'proper' settings - which shows that something needs to be addressed in the os...I was having good luck with the yahoo music app, but depended on the stream (maybe some buffer more :dunno - the ping results are garbage.
EDIT: I tried installing high performance wifi again, and finally got the widget to one of the homescreens! Let me break it down for anyone else who comes across this. After install, the small 1x1 blue app box is put on your desktop and the black screen comes up with the wireless networks and a checkbox. I then went to apps->widgets and tried putting the 2x2 widget on the home screen again, and like always it clicks on like its there (and when you click home and its never there). However, this time I hit BACK instead of home after dropping the widget and it took me back to the black screen with the checkbox, then i hit home and voila its sitting there. You can click on it like you mentioned! Confirmed with ping for tune in...pings remain low.
If this continues to work, it may be a godsend. It is annoying having to have this, but far far better than not.

I had that problem also especially when i tried to download big files when the screen turn off the download speed became extremely slow, this widget solve this, i think to that moment its the easiest solution tap it when you need it tap it again when you done.
By the way i had this problems with franko kernel also and again to my opinion it is the good solution for now, until the apps developers update their apps.
Sent from my Galaxy Nexus using XDA

If you download the SDK - you only need Android SDK Platform-tools - to a PC and use the adb shell it is easy to dump the WiFi lock state with dumpsys wifi and see exactly which app(s) are holding what locks. Completely takes all of the guessing out of who is doing what when. Judging the behavior can be subjective because there are other reasons that the WiFi can break up which can be very frustrating.
developer.android.com/guide/developing/tools/adb.html

Erlang2012 said:
I had that problem also especially when i tried to download big files when the screen turn off the download speed became extremely slow, this widget solve this, i think to that moment its the easiest solution tap it when you need it tap it again when you done.
By the way i had this problems with franko kernel also and again to my opinion it is the good solution for now, until the apps developers update their apps.
Sent from my Galaxy Nexus using XDA
Click to expand...
Click to collapse
The app does work well, however I have been running into some issues as I continue to use it. It randomly decides to turn off the forced max wifi (even though its still blue and looks like its operating) or perhaps the phone is forcing the wifi issue again. It seems to happen when you are downloading, playing with some other apps? You only notice it when you sleep it and the streaming radio immediately starts having issues.
Solution is to flip back to the widget turn it off and turn it on again. It works, but is another annoyance.
I haven't yet ascertained exactly what causes it to switch off yet.
tlum said:
If you download the SDK - you only need Android SDK Platform-tools - to a PC and use the adb shell it is easy to dump the WiFi lock state with dumpsys wifi and see exactly which app(s) are holding what locks. Completely takes all of the guessing out of who is doing what when. Judging the behavior can be subjective because there are other reasons that the WiFi can break up which can be very frustrating.
developer.android.com/guide/developing/tools/adb.html
Click to expand...
Click to collapse
I will look into this, thank you.
---------- Post added at 06:16 PM ---------- Previous post was at 05:28 PM ----------
I used the adb shell (learned how to install all these dev tools and how to use it first ) and here is some updated info:
Tunein = type=1
Pandora = type=1
Audioaddict service (Digitally imported app I posted above previously) = type=3
google music = type=3
High performance app = type=3 (havent figured out why this likes to stop randomly)
I will update with more app info, hopefully others can also email the developers and see that it gets fixed, so we no longer have to use damn workarounds...

jeep364 said:
... It randomly decides to turn off the forced max wifi (even though its still blue and looks like its operating)...
Click to expand...
Click to collapse
Yes, it definitely has an issue holding its lock, and it definitely seems related to another application taking over and also when it switches to cell and back, I can confirm that. It may be related to the OS since the widget thinks it still on when clearly the lock as been released, so it may be that the OS released the lock and the widget has no idea. I haven't taken the time to look into the details yet, and this is something we should make the developer aware of.

tlum said:
Yes, it definitely has an issue holding its lock, and it definitely seems related to another application taking over and also when it switches to cell and back, I can confirm that. It may be related to the OS since the widget thinks it still on when clearly the lock as been released, so it may be that the OS released the lock and the widget has no idea. I haven't taken the time to look into the details yet, and this is something we should make the developer aware of.
Click to expand...
Click to collapse
Yup, from what I can see it loses lock:
1. when cell switching
2. manually killing/starting wifi
3. when ANY application is downloaded/removed (ie. changes in permissions)
4. when playing with dolphin, other apps for more than a few minutes, it will kill it even though the blue stays lit. I think its as you mentioned, during general use of the phone, at some point some permissions are changed and hifi performance is tossed off its lock.
If you only are streaming music and re enter the phone to check a gmail alert or two...it seems to be fine. otherwise you need to hit the lock widget one more time before sending it to sleep with pandora/tune in playing.

Verizon Marshmallow Location Bug

Anyone noticing the location GPS is funky? I typically turn my GPS off when not in use and I am finding that when using the PullDown toggle, the annoying Location Icon/Notification gets stuck on, and other times won't come on after its been off.
The only way to fix it is to turn it off and reboot, or turn it on and reboot. But after it gets toggles, it gets screwy again.
I haven't done much testing yet to see if it is just the icon or actually the GPS failing to toggle. Also I am wondering if going through settings to toggle is a work around.
I am out of town for work but wanted to quickly throw it out there to see if anyone others experience this weird behavior. I don't have time this week to really sit down and play with it, so a quick fix (if available) is known.

+1 on this. Just noticed the other day when I had to navigate to a party. I arrived and turned off location and it was still stuck in notification tray. Think it went away eventually, but I didn't have time to reboot so not sure what happened. Will keep an eye on it next time though.
Also, noticed the phone has trouble switching from 1x back to 4g. Has to use airplane mode to cycle the radio.

Yea I noticed that too. Again I am traveling and normally have GPS off and only turn it on when I actually launch Google Maps.
I was listening to Pandora mostly with no issues on my 8hr drive but twice, I think, I had to toggle airplane mode to get back data.
The Location notification is ridiculous. I mean its stupidly annoying already but now its getting stuck.

player911 said:
Yea I noticed that too. Again I am traveling and normally have GPS off and only turn it on when I actually launch Google Maps.
I was listening to Pandora mostly with no issues on my 8hr drive but twice, I think, I had to toggle airplane mode to get back data.
The Location notification is ridiculous. I mean its stupidly annoying already but now its getting stuck.
Click to expand...
Click to collapse
Just chiming in. I haven't noticed these problems. Then again I've only been on MM for 5 days now.

I get the location icon stuck in the tray as well. Reboot is the only cure.
New Wifi lag is the biggest problem for me on MM.

phonepie said:
Just chiming in. I haven't noticed these problems. Then again I've only been on MM for 5 days now.
Click to expand...
Click to collapse
You really only notice it if you turn off Location, the little PIN notification gets stuck and doesn't go away on the status bar and notification that says Location on or something.
Pretty annoying.
Also my wifi just randomly stops working. I have to disconnect, reconnect and it starts again. Different topic though.

player911 said:
You really only notice it if you turn off Location, the little PIN notification gets stuck and doesn't go away on the status bar and notification that says Location on or something.
Pretty annoying.
Also my wifi just randomly stops working. I have to disconnect, reconnect and it starts again. Different topic though.
Click to expand...
Click to collapse
Ah ok, I hadn't had that problem. As of last night I downgraded and then rooted and removed bloatware. So doubt I'll see them problems. Though I am facing a few minor ones mainly with the all apps dual window mod. But like you said that's a different topic. Main reasons I downgraded was of course because I like full control over something I own. But wanted the 60fps video recording which I'm pretty sure we can all agree should have been included with the G4. I also finally found a nice work around for enabling silent mode with the actual volume button since the xposed module with true silent didn't work for the G4. Sorry I'm getting off topic here. But hope you find a fix.

Yea I was good with lollipop. Marshmallow hasn't included anything except bugs. I resisted the upgrade for a while but I was not rooted and the System Update popping up constantly was drivingme crazy.

A6 fixed a few annoying bugs for me but brought others.
The location notification getting stuck can happen even with location on, I never turn mine off.
Biggest problem for me WiFi disconnecting at 15%, and needing a reboot to reconnect.

Yea the location notification does get stuck regardless if turned off or not.
I ended up getting rid of the G4 because of the problems. (Qi Charging, wifi disconnects, etc).

WiFi turns off during sleep

I work in an office thats underground, Cell reception is almost non-existent. So I depend on WiFi to keep my phone in touch with the 'net. Otherwise, my battery just drains before lunch time.
Because of this, I have to make sure that my phone DOES NOT turn off wifi while it's asleep. Otherwise, while its sleeping, it will just eat up the battery as my phone tries to report my every action to Google, and check my email.
I had this working perfectly, and then I decided to try out Android N developer preview, used it for a few days, and then factory reset the phone to go back to M. No big deal, I've done this sort of thing a thousand times with my various phones, and this is part of why I bought a Nexus this time around.
After the reset, I cant seem to convince my phone to keep it's wifi on during sleep. The option is set in the advanced wifi settings to keep wifi on during sleep always. Yet every time i turn off the screen and set my phone down, it goes silent, until I pick it up and unlock it. If it sits long enough, when I unlock it, I actually see the wifi icon missing from my status bar, and it comes on after a few second,s and then the notifications come flooding in. It's obviously doing something that disables wifi when the screen is not active.
This is killing my battery, because even though wifi is off, it's still doing its thing, trying to keep in touch with its various sync services. Its attempting to depend on cell service, which most of the time is flat out non-existent at my desk.
So what can I do to fix this? Is it possible something didnt get cleanly wiped when I reinstalled the stock rom after my foray into N? I've tried doing things like wiping dalvik, but that hasnt helped. I've also received the April OTA since then, and nothing regarding th WiFi problem has changed.
Any suggestions?
Thanks!

The only thing I can think to try is removing your known WiFi networks and adding it back.
In the mean time as a work around, you can disable mobile data so when WiFi does drop out it switches over to a voice only signal.

bblzd said:
The only thing I can think to try is removing your known WiFi networks and adding it back.
In the mean time as a work around, you can disable mobile data so when WiFi does drop out it switches over to a voice only signal.
Click to expand...
Click to collapse
Thanks.
I have tried clearing out the saved wifi network for work, and re-joining it. Didnt help. I even went so far as to have the network guys de-authorize my phone, so when i rejoined it would be like it was never there before. Also didnt help.

What were the steps you took to return to stock?

Verizon S8+ Bugs and Issues

Hi everyone,
I have 2 Galaxy S8+ from Verizon and here are my issues:
Past issues:
One of them did not come with the Galaxy Apps store (Not the plays store), and that phone also experienced the DQA issue
Current issues:
If I turn on Fingerprint gestures, the fingerprint sensor will stop working, this was an issue I had from the day I got the phone and has continued even through the updates. Here's a thread I made about it a while ago : https://forum.xda-developers.com/galaxy-s8+/help/fingerprint-sensor-t3595614
My internal speaker has detached, or at least I think that is the issue, as sometimes when I am in a phone call and shake the phone just a little bit, it will either start making a weird buzz sound or completely cut off the sound. Shaking it again will fix it, that's why I think it's a physical issue. I haven't dropped my phone and just in case I ever do, I have a case and a screen protector on it, and neither of them (phone, case, screen protector) have any damage marks on them.
The Biggest Issue: Currently this is the most annoying bug I am experiencing is that whenever I go to lock screen and security in the setting app, it crashes the settings app. I also can't use the search function in the settings app, as it crashes the app withing a few seconds. The lock screen and security is the only menu in which I experience this, I am 99% sure this is due to me turning on Secure startup. I had it turned on a few days after I got the phone and it worked great, I had to turn it off once, about a month ago in order to get a quicker boot. After that I was experiencing issues turning it back on (meaning I turned it on, rebooted the phone and it would not work) , after some persistence, I was able to get it to work and it has worked and still works.
One thing to mention is that I had done the most recent system update, I am not sure this issue was caused by at, since the inability so search in the setting menu has happened prior to the latest update.
I have tried everything other than a full factory reset (wiping all cache, wiping apps cache, reset setting, reset network settings), which I refuse to do, It is absolutely unacceptable for me to pay this much for this phone and have so many issues with it, I have factory resetted my phone (Samsung's recommendation) in order to fix the first issue listed above, multiple times and it did not work.
At this point I really don't know what to do, Samsung support has been useless in this, I don't wish to replace my phone right now as I need it to much to even give up for one day, If anyone has any advice/fix other than factory resetting, I'll happily try it.
Thank you,
GGgamer16

Sounds like a factory reset is needed. I just tried all you mentioned with zero problems on the newest update w/ navbar options and experienced none of that. Speaker problem is most likely hardware related.

Anyone had any luck getting rid of the wifi disconnect? The issue where wifi disconnects showing a ! next to the wifi symbol on the status bar?

*Hooligan* said:
Anyone had any luck getting rid of the wifi disconnect? The issue where wifi disconnects showing a ! next to the wifi symbol on the status bar?
Click to expand...
Click to collapse
You try changing your WiFi channel? Using 5ghz or 2.5ghz? I use Wifi 100% of the time I'm home and never have any issues with disconnects.

brandonc0526 said:
You try changing your WiFi channel? Using 5ghz or 2.5ghz? I use Wifi 100% of the time I'm home and never have any issues with disconnects.
Click to expand...
Click to collapse
Yeah I have tried changing channels. It didn't matter. I'm on 2.4 GHz.

I found a possible fix from another forum. I changed my wifi encryption from wpa2 AES/tkip to wpa2 tkip only last night and was rock solid after that point. I didn't have any more wifi issues... Just wanted to mention this change for other people. I usually got 5+disconnects every night. I'm gonna try just the AES option tonight and see how it acts.

Available WiFi networks list repopulates every single time

I'm at my wits end with this problem. Hopefully someone knows what's going on.
The problem: Everytime I open the available wifi networks menu it always shows an empty list, which repopulates after 3-4 seconds. It is fairly annoying to wait for the phone to find all available networks.
Expected behavior: when opening the available wifi list, it should already be populated. At least, that's what happened on all of my previous phones, except for the Pixel 2. Is this a problem with the Pixel line? Can anyone confirm?
I think there's something wrong with my wifi settings. I've tried everything: wifi scan throttling on and off, wifi scanning on and off, turn wifi on automatically on and off, open network discovery on and off... what's going on??
Rooted Pixel 3 on stock Android 10 (December patch), Kirisakura kernel.

redsmith said:
I think there's something wrong with my wifi settings. I've tried everything: wifi scan throttling on and off, wifi scanning on and off, turn wifi on automatically on and off, open network discovery on and off... what's going on??
Rooted Pixel 3 on stock Android 10 (December patch), Kirisakura kernel.
Click to expand...
Click to collapse
I just checked mine and it took a few seconds to scan but after that if I closed it out and went back into it, all the networks were still there that it had scanned previously a few minutes ago. Tested it a few more times after that and a few new ones were mixed in without having to wait for it to scan when I opened the WiFi page. Maybe try a different kernel and see

Mine is behaving exactly as you both describe. For better or worse I think this is the intended behavior.

KUSOsan said:
I just checked mine and it took a few seconds to scan but after that if I closed it out and went back into it, all the networks were still there that it had scanned previously a few minutes ago. Tested it a few more times after that and a few new ones were mixed in without having to wait for it to scan when I opened the WiFi page. Maybe try a different kernel and see
Click to expand...
Click to collapse
Thanks. Since yesterday, I've noticed mine does that as well, but I would say it's only about 20% of the time. As soon as I do other things on the phone, the wifi picker clears itself, as though the list was being kept in memory. Did you try switching to other tasks as well? The annoying thing is that my other devices always keep the list populated. My wife's S10e on Android 10 works well, I have an old OnePlus 3T and it works normally. Even my ancient Nexus 9 works as intended. Is this something exclusive to the Pixel line? Something to do with the RAM issues on the Pixel 3?

redsmith said:
Something to do with the RAM issues on the Pixel 3?
Click to expand...
Click to collapse
Only time I've noticed it is when I'm sleeping and the phone is idle for hours or similar scenario. I don't keep my wifi on when I'm not using it so it doesn't scan in the background. The pixel 3 series has been known to have bad memory management which I've read has been fixed with the December security update supposedly. So maybe that's something to look into.