Develop Bugs

[Q] Weird Screen Flicker Issue

Hi guys,
My Galaxy Nexus has a weird issue that I can't seem to figure out whether it is caused by software or hardware. A portion of my screen seems to flicker when I have certain apps open. They all have a common cause. For instance when I open Chrome and begin to do a search from the top I notice the drop down results will flicker in sync with the cursor. It doesn't appear that the whole screen flickers. It only seems to be the drop down results which are typically black text on white backgroud that flicker. I don't notice anything similar within all other apps such as the standard messaging app which have blinking cursors. I can also get the same flickering result in my IMDB Movie app while starting a search within the app which will start to display results that faintly flicker. I have never seen it flicker using a screen testing app such as the ones used for detecting dead pixels. I am not sure if this is something has always existed on my phone, but I noticed this about a week ago while still on 4.1.2. I am now on 4.2 and still have the issue. I attempted a factory reset just to see if that would clear it up but it didn't. Has anyone else experienced this or have some insight for the flickering? I wanted to see if anyone has noticed this before I start the whole Samsung tech process!
One additional observation I made is that when I don't notice the flickering within Chrome,it will remain without any issue until I go and start clearing recent apps.
Thanks,
Jay

Sounds stupid but you sure its not an auto-brightness issue? Samsung phones are known to have crazy auto brightness but anyway try clearing the cache for each app that seems affected....check back let us know what happens

Thanks for the response. I have turned off auto brightness and tried manual brightness settings with the same result. It hasn't become worse, but I can't explain it either way. I have tried clearing the cache for chrome and other apps, but that also hasn't improved things. I am wondering if I try flashing the phone with a fresh stock image instead of just a factory reset since that automatically re-downloaded my apps. I have never done any modifications (root or unlock) so I am not sure that would really help. Maybe the screen is beginning to go bad, but I figured it would flicker when using a screen test app. It only flickers on the white background for specific app search results (ex. Chrome, IMDB, and Zillow).
Thanks again,
Jay

So I did some more troubleshooting and I started uninstalling apps to see if I could find an app causing the issue if it was software. For some reason if I am running my XDA Forum app and leave it running in the recent apps list then I don't get the flicker within Chrome or other apps that have search with drop down results. It is just the search results that flicker and not the whole screen. As soon as I swipe away the XDA app then the flickering returns. I tried uninstalling the XDA app and the flickering continues. It is fairly subtle. I could try a factory reset again and not allow Google to re-install my apps and see if that resolves the issue, but it is very strange overall. I swung over to a Verizon store that still had one on display (even though mine is a GSM model)and noticed there unit had similar behavior and it could be a coincidence. It is pretty subtle, but I am confused why the XDA app keeps it from doing it.
Jay

PAC-Man ROM problems

This is the first time I have used a PAC-Man rom, and I have spend a half hour trying to find a couple of settings. If anyone else is familiar with the ROM, and can lend a hand, I would GREATLY appreciate it.
Ok, first off, where to I set the screen timeout? I don't see the setting under the normal settings->display options.
Second, I found that when I look at my recent apps, I see a little app bar with Apollo music player, camer, calendar, calculator, twitter and a couple others in it. Is there any way that I can customize these shortcuts? I play all my music through Google Play Music, and would love to substitute Apollo for it.
For now, that's all I can find (or can't find) wrong. Finally having an S-Off One is really showing off how awesome this phone is.

For the display timeout. Settings>Display&Lights>Sleep.
As for the bar in recents, I'm looking for a way to customize it as well.
Have you noticed any problems with WiFi or loading videos at all? For some reason I can't play Videos through the web or app for YouTube. And my WiFi seems to run at about half speed when I run a speedtest, compared to other devices.

I had problems for a while with YouTube, but without really doing anything it started working (I may have rebooted due to problems with my home screen). I haven't seen away to customize the shortcuts on recent apps yet either. Have you guys charged at all? Mine phone got pretty hot.
takeclear said:
For the display timeout. Settings>Display&Lights>Sleep.
As for the bar in recents, I'm looking for a way to customize it as well.
Have you noticed any problems with WiFi or loading videos at all? For some reason I can't play Videos through the web or app for YouTube. And my WiFi seems to run at about half speed when I run a speedtest, compared to other devices.
Click to expand...
Click to collapse

brholt6 said:
I had problems for a while with YouTube, but without really doing anything it started working (I may have rebooted due to problems with my home screen). I haven't seen away to customize the shortcuts on recent apps yet either. Have you guys charged at all? Mine phone got pretty hot.
Click to expand...
Click to collapse
I've been running the ROM since we got rumrunner, and I've noticed my phone actually runs cooler while charging and normal use.

I just happened to wake up in the middle of the night and checked it. It was cooler than usual like you mentioned. I dont know what the deal was.
Sent from my One using xda app-developers app

Have you had problems with a laggy launcher at all? Sometimes when I return to the home screen from an app, none of my icons or widgets show up until I hit the app drawer.
Sent from my One using xda app-developers app

I still have yet to figure out how to change the recent apps. I haven't noticed my phone getting hotter than normal, so I'd check to see what apps you have running.
I also haven't had any issues with YouTube, but for some reason, Google Search doesn't want to work. It just looks like it keeps trying to load and nothing ever comes up. It states that a new version is available, but when I try to update, saying that the "Package file was not signed correctly. Uninstall the previous copy of the app and try again." So, whenever I need to search for something, I have to go into chrome and search, which is a pain.

I updated to the 10/13 nightly and it seems to be running pretty well. Battery life is a bit better too. In the PACman thread it sounds like the 10/14 nightly didn't quite build right.
Sent from my One using xda app-developers app

PAC-Man seems to be the best of all worlds. Unfortunatly, I have had little luck with it on any phone I have tried it on. Works great on my Samsung 7.7 tablet but tried it on my GNEX and S3 and I would have constant issues. Very laggy and random reboots. Some apps also did not place nice with it on the GNEX and S3. I have not tried it on the One as Vanir seems to be running really good.

Mike02z said:
PAC-Man seems to be the best of all worlds. Unfortunatly, I have had little luck with it on any phone I have tried it on. Works great on my Samsung 7.7 tablet but tried it on my GNEX and S3 and I would have constant issues. Very laggy and random reboots. Some apps also did not place nice with it on the GNEX and S3. I have not tried it on the One as Vanir seems to be running really good.
Click to expand...
Click to collapse
I did have some issues with lag, but after switching to Nova launcher I haven't had any problems. It does sound like the most recent nightly has some fixes for the laggy launcher. Other than that minor issue, this ROM has been pretty stable.

I'll give it a shot. Thanks.

Major lag issues after system crash, barely usable

I have major lag issues when pressing the phone screen (the screen turns on sometimes 5 to 10 seconds after pressing the lock or home button), and the UI is very laggy at all times, apps like the keyboard sometimes take about 5-8 to load, and the gallery app takes sometimes as long as a minute to load.
The reason for the problem:
The problem started when I was trying to up a pic on instagram and then I opened the gallery to choose a picture, the phone lagged, thought this was something usual, waited for 1-2 mins, but the gallery app didn't load at all, the screen was black so I said what the heck, maybe a random hang, just tried to restard - phone did not respond so I removed the battery and after that the phone had major lag issues, before that I did not have any problem at all. This happened on stock android 4.2.2...
Here is what I did
I flashed stock 4.2.2, did everything as usual. wiped data after flashing and the phone was still laggy as f, I reverted to 4.1.2 which was smooth as butter and it lagged also... Now I flashed 4.2.2 a couple of times and the problem still persists. Thinking of getting it checked at the customer care centre, but before this happens I'd like to try to fix it on my own.
Any ideas, anyone ?

exeqt333 said:
I have major lag issues when pressing the phone screen (the screen turns on sometimes 5 to 10 seconds after pressing the lock or home button), and the UI is very laggy at all times, apps like the keyboard sometimes take about 5-8 to load, and the gallery app takes sometimes as long as a minute to load.
The reason for the problem:
The problem started when I was trying to up a pic on instagram and then I opened the gallery to choose a picture, the phone lagged, thought this was something usual, waited for 1-2 mins, but the gallery app didn't load at all, the screen was black so I said what the heck, maybe a random hang, just tried to restard - phone did not respond so I removed the battery and after that the phone had major lag issues, before that I did not have any problem at all. This happened on stock android 4.2.2...
Here is what I did
I flashed stock 4.2.2, did everything as usual. wiped data after flashing and the phone was still laggy as f, I reverted to 4.1.2 which was smooth as butter and it lagged also... Now I flashed 4.2.2 a couple of times and the problem still persists. Thinking of getting it checked at the customer care centre, but before this happens I'd like to try to fix it on my own.
Any ideas, anyone ?
Click to expand...
Click to collapse
Use this post its help me.. Its sure help u
http://forum.xda-developers.com/showthread.php?t=2652690

Rahul111 said:
Use this post its help me.. Its sure help u
http://forum.xda-developers.com/showthread.php?t=2652690
Click to expand...
Click to collapse
Tried it, lag still persists, this could be a hardware problem, as I mentiooned above the big lag issues started after the crash / black screen lag happened, so I am assuming something could have went wrong in the hardware part of the phone,softwarewise there should not be any lag, because Ive triet 4.1.2 and its completely lagless, now it lags like a mofo.
Thinking of brnging it to the customer care service, good thing the phone is still in warranty.

Dunno about the blackscreen but try using LagFix (it's on GPlay).
That app helped to me solve hanging issue I had.
Sent from my GT-I9082 using Tapatalk

Check u r RAM usage if any app is eating away u r memory coz I had same problem but not black screen and I flashed back 4.1.2 then again 4.2. 2 and did had reset then I disabled gallery app in settings and installed quick pic app from Gplay and all my lag issue solved..hope it will help u..
Sent from my GT-I9082 using XDA Premium 4 mobile app

[Q] Somethings Wrong with my S4

Hi guys, I never posted here but am trying to find some help. I've had my S4 for quite a while now, and I just factory reset everything because I kept getting a "Unfortunately, the process android.process.acore has stopped." message that wouldn't go away or let me use my phone without an interruption literally every 2 seconds. But before I even had that problem, there were worse problems as well. There are two things that occur frequently:
1. Sometimes, when I tap on an icon, the indicator light shows up (a glow around the icon), but the app itself does not open. Then, if i tap on it repeatedly, nothing happens. I can temporarily fix this problem by opening up the recent/opened apps list (holding home button) and clearing everything (or clicking on that app if it had been opened). Once cleared, I can tap it again and it would open. As you might see, this can get very annoying and troublesome after doing it so many times. Is there anyway I can permanently fix this so that I don't need to keep clearing the open apps list?
2. Sometimes, when I unlock my screen, exit an app, press the home button, or clear the opened app list (as mentioned above), my wallpaper changes to an app. The app is usually random and sometimes is not one that I had opened. For example, the background of my messaging app or Astro File Manager would show up even if I had not recently opened it at all. I can also temporarily fix this by clearing the recent/opened apps list (as mentioned in #1). After clearing this, the wallpaper resets. Is there any way I can fix this permanently as well?
3. Snapchat and VSCO Cam constantly "stop unexpectedly". I don't know if this is a firmware or incompatibility issue, but it usually works fine. This message pops up once in a while and isn't too burdensome, but is still quite annoying.
Thank you for all the help in advance. I am trying to get the most out of my phone and appreciate any help.

Are you running stock or custom and has anything changed since you factory reset?
Sent from my SGH-M919 using Tapatalk

serio22 said:
Are you running stock or custom and has anything changed since you factory reset?
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
It's stock right now. Not rooted or anything at all. I didn't really change much of the device internally, only downloaded a couple of apps, but those have been working fine since the beginning. It is running Kit Kat, 4.4.2. I am currently using Nova Launcher as my home screen replacement.

Screen Flickering

Hi,
So I offer this phone to my wife this xmas and everything was going smooth until we found this issue:
https://www.youtube.com/watch?v=xYFdyDwuS_w
The bottom screen does this flickering when typing with Swiftkey keyboard on some apps. This one is Doggcatcher but it happens on other apps too.
If I swap to GBoard it does not happen. We're on Android Pie 9.0.
Has anyone found this issue?

Seems like a graphic bug in that specific keyboard.

Please, i need help.
Evaluate for yourself whether it is related to this topic.
Occasionally, graphical glitches appear on my Mi A2 lite, (4/64, Android Pie, December update, locked bootloader, no root, intact system).
In most cases, they flickering all over the screen, and in some other cases they are frozen, as is shown in attachment.
They are completely random and they appear through many applications that i use.
I can not determine the cause.
Does anyone else have a similar problem?

me... on chrome and all app that use webview... during call status bar is flickering... when switch to the camera in whatsapp with swipe to set status... and other

Something similar here, if Facebook Messenger chat head is overlaying YouTube it flickers a lot (only the actual video but the description and recommend are always working without flicker also no problems in fullscreen), less often it happens with Chrome and sometimes YouTube does it without Facebook Messenger even being open (Android Pie Dec. 5) [also it didn't happen for the first few weeks with 8.1 then Pie got released and worked well for some days then this started to happen]

I have that problem , the notification bar flickers a lot and when on video calls, it shows a black flickering rectangle at the bottom of the screen

Hi, I've got the same problem here. For me, the flickering appears when the keyboard is open, and get faster while typing, please does someone know how to fix that?

gonsa said:
Hi,
So I offer this phone to my wife this xmas and everything was going smooth until we found this issue:
The bottom screen does this flickering when typing with Swiftkey keyboard on some apps. This one is Doggcatcher but it happens on other apps too.
If I swap to GBoard it does not happen. We're on Android Pie 9.0.
Has anyone found this issue?
Click to expand...
Click to collapse
It is true that it is the keyboard, my keyboard developer is fixing the bug making it do that as we speak but in my case the whole screen flashes black instead of the little box you have

The problem with the flickering screen in some apps like Youtube, Chrome or Instagram can be fixed as follows:
Go to Developer Options and activate "disable hw overlays"
However, the setting must be set again after every Phone restart.

PC295 said:
The problem with the flickering screen in some apps like Youtube, Chrome or Instagram can be fixed as follows:
Go to Developer Options and activate "disable hw overlays"
However, the setting must be set again after every Phone restart.
Click to expand...
Click to collapse
Isn't that bad long term?
"Without a hardware overlay every application that is displaying things on the screen will share video memory and will have to constantly check for collision and clipping to render a proper image, this can cost a lot of processing power. With a hardware overlay each application gets its own portion of video memory, getting rid of the need to check for collision and clipping."

RyanHardy said:
Isn't that bad long term?
"Without a hardware overlay every application that is displaying things on the screen will share video memory and will have to constantly check for collision and clipping to render a proper image, this can cost a lot of processing power. With a hardware overlay each application gets its own portion of video memory, getting rid of the need to check for collision and clipping."
Click to expand...
Click to collapse
So far, I have not encountered any problems because of this.

gonsa said:
Hi,
So I offer this phone to my wife this xmas and everything was going smooth until we found this issue:
The bottom screen does this flickering when typing with Swiftkey keyboard on some apps. This one is Doggcatcher but it happens on other apps too.
If I swap to GBoard it does not happen. We're on Android Pie 9.0.
Has anyone found this issue?
Click to expand...
Click to collapse
Got this issue too.. atimes when viewing camera images the flickering starts

PC295 said:
So far, I have not encountered any problems because of this.
Click to expand...
Click to collapse
Mine was having same flickering, checked HW overlays. It was disabled by default, I enabled it and now working perfectly. Thanks alot