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[Q] screen flickering on AOSP

Already tried HW overlays, build.prop mods, WiFi optimization off, nearly threw my phone on window. Still flickers on apps with BLACK background. (e.g poweramp, GTA SA, etc etc.) the flickering disappears on apps with WHITE background (e.g Opera classic, play store, etc) any help? will be appreciated
Android 4.2.2 running AOSP
EDIT: the problem doesnt appear to show at logcat, and whenever I take a screenshot, the white lines (it comes after flickering. this white lines appear at the bottom of navigation bar or should i say under the screen.) doesnt appear on the screenshot. i think this is a hardware problem. tried factory reset, change rom, etc etc.

hartlezzevolved said:
Already tried HW overlays, build.prop mods, WiFi optimization off, nearly threw my phone on window. Still flickers on apps with BLACK background. (e.g poweramp, GTA SA, etc etc.) the flickering disappears on apps with WHITE background (e.g Opera classic, play store, etc) any help? will be appreciated
Android 4.2.2 running AOSP
EDIT: the problem doesnt appear to show at logcat, and whenever I take a screenshot, the white lines (it comes after flickering. this white lines appear at the bottom of navigation bar or should i say under the screen.) doesnt appear on the screenshot. i think this is a hardware problem. tried factory reset, change rom, etc etc.
Click to expand...
Click to collapse
Here's the picture of the flickering. Thanks guys

This is known to happen on clone devices due to using sub par hardware parts. IT is even harder to fix without the kernel source for the device.

zelendel said:
This is known to happen on clone devices due to using sub par hardware parts. IT is even harder to fix without the kernel source for the device.
Click to expand...
Click to collapse
Youre right sir. Its a clone of XOLO a500l. But I just went today on my phone's customer service and they said that the LCD needs a replacement? I cant understand this problem. Is it hardware related or software related? Btw thanks for your response sir!

hartlezzevolved said:
Youre right sir. Its a clone of XOLO a500l. But I just went today on my phone's customer service and they said that the LCD needs a replacement? I cant understand this problem. Is it hardware related or software related? Btw thanks for your response sir!
Click to expand...
Click to collapse
Most likely the hardware gave it. This not new when they use sub par hardware.

OPO touchscreen error, lagged response, only showing piled fragments

Hi all,
Since a couple of days my OPO is doing crazy things on the display. Unfortunately I cannot post here any pics or video.
BUT you can find a video of my screen issue if you search for "OPO touchscreen error, lagged response, only showing piled fragments" on forumsDOToneplusDOTnet
It started out of nowhere, sometimes it goes back to normal and works flawless for some minutes only.
Issue: Touch responses are lagged, it's hard to impossible to navigate on the screen, the display changes constantly showing random fragments of the same piled up.
Has anyone seen something like this before?
Is it rather a hardware or a software issue?
Any suggestions of how to repair it?
Thanks a lot.

SasBro said:
Hi all,
Since a couple of days my OPO is doing crazy things on the display. Unfortunately I cannot post any pics or video.
It started out of nowhere, sometimes it goes back to normal and works flawless for some minutes only.
Issue: Touch responses are lagged, it's hard to impossible to navigate on the screen, the display changes constantly showing random fragments of the same piled up.
Has anyone seen something like this before?
Is it rather a hardware or a software issue?
Any suggestions of how to repair it?
Thanks a lot.
Click to expand...
Click to collapse
Did you tried reflashing your current ROM?

Mr.Ak said:
Did you tried reflashing your current ROM?
Click to expand...
Click to collapse
Thanks for your suggestion.
I haven't tried reflashing, but will do if I don't hear of another solution.
You can find a video of my screen issue if you search for "OPO touchscreen error, lagged response, only showing piled fragments" on forumsDOToneplusDOTnet

SasBro said:
Thanks for your suggestion.
I haven't tried reflashing, but will do if I don't hear of another solution.
You can find a video of my screen issue if you search for "OPO touchscreen error, lagged response, only showing piled fragments" on forumsDOToneplusDOTnet
Click to expand...
Click to collapse
Try that,then only we can confirm if that's sw or hw.

Touch reaction time issue

The touch recognision time on the lower part of the display (corners more likely) is really slow (up to 1 second)
I already did a screen calibration via the app "Touchscreen Repair" but it didn't fix the problem.
Anybody knows what's up with that? How do I fix this? Can this be fixed with a future update? Anybody else having this problem?

AleKaz said:
The touch recognision time on the lower part of the display (corners more likely) is really slow (up to 1 second)
I already did a screen calibration via the app "Touchscreen Repair" but it didn't fix the problem.
Anybody knows what's up with that? How do I fix this? Can this be fixed with a future update? Anybody else having this problem?
Click to expand...
Click to collapse
It's noticable in some instances with some apps like chrome and YouTube, but it's nothing major and it's not all the time. I use gesture navigation and it's pretty quick to respond every time.

mikex8593 said:
It's noticable in some instances with some apps like chrome and YouTube, but it's nothing major and it's not all the time. I use gesture navigation and it's pretty quick to respond every time.
Click to expand...
Click to collapse
Okay thank you, do you think it's getting fixed in the future?

AleKaz said:
Okay thank you, do you think it's getting fixed in the future?
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Click to collapse
Most likely. There has only been 1 update so far. They rely a lot on user input and when it comes to updates, they are very fast.

AleKaz said:
The touch recognision time on the lower part of the display (corners more likely) is really slow (up to 1 second)
I already did a screen calibration via the app "Touchscreen Repair" but it didn't fix the problem.
Anybody knows what's up with that? How do I fix this? Can this be fixed with a future update? Anybody else having this problem?
Click to expand...
Click to collapse
Sometimes tapping doesn't register the first time here. I'm using a custom ROM but before that I flashed the latest firmware components. No idea if it's the ROM or the governor or another thing.
Edit: It's the custom ROM. Stock is fine.

[Fix] multi touch/ghost touch issue

Those who don't know there are some people having ghost touch issues on POCO f1 and one guy able to capture it on the video. I personally didn't had the issue but after trying I was able to recreate the issue on my device. soon after I found the cause and able to fix the issue. this may or may not work on your device but absolutely worked for me. this seems to be a software bug. and no-one needs to panic. hopefully it will be fixed in next update.
how to recreate the issue?
Steps
1. download a multi touch tester app I used this
2. first do some testing yourself see if you can spot the issue
3. now do 3 finger swipe down (phone will take screenshot)
4. now randomly touch your screen with 1 or 2 fingers you'll notice 1 or 2 ghost touches.
How to fix Fix it?
Steps
1. go to settings>additional settings>button and gesture shortcuts>take a screenshot
2. and set it to none.
3. reboot
that's it!
the issue should be fixed
please let me know whether this worked for you or not

Yes.
As you mentioned issue was there.
But fixed with those steps.

okaraosp29 said:
Those who don't know there are some people having ghost touch issues on POCO f1 and one guy able to capture it on the video. I personally didn't had the issue but after trying I was able to recreate the issue on my device. soon after I found the cause and able to fix the issue. this may or may not work on your device but absolutely worked for me. this seems to be a software bug. and no-one needs to panic. hopefully it will be fixed in next update.
how to recreate the issue?
Steps
1. download a multi touch tester app I used this
2. first do some testing yourself see if you can spot the issue
3. now do 3 finger swipe down (phone will take screenshot)
4. now randomly touch your screen with 1 or 2 fingers you'll notice 1 or 2 ghost touches.
How to fix Fix it?
Steps
1. go to settings>additional settings>button and gesture shortcuts>take a screenshot
2. and set it to none.
3. reboot
that's it!
the issue should be fixed
please let me know whether this worked for you or not
Click to expand...
Click to collapse
Good stuff. I was skeptical at first since I knew something was off sometimes. Thanks for confirming it. Should be fixed if they took notice of this bug.

Thanks! The issue is 100% reproducible with the app. By turning off 3 finger screenshot shortcut, the issue goes away.

Guys, please file a bug, so this can be fixed and we can go back to using this feature.

1.Yes, that issue is due to the screenshot feature, but shouldn't the phone be able to distinguish between 3 finger touch and more than 3? Either take screenshot on four finger swipe or register it.
2.Can you please confirm if there is accuracy problem in PUBG aiming when you use multitouch? Like the multitouch bugs in Pixel and Zenfone Max Pro but quite subtle, the thing about the other devices are, they look and have been acknowledged by the respective companies regarding the issue but in our case, Xiaomi or Poco is making no announcement or anything.
https://www.youtube.com/watch?v=e5K2N6McC_s

The issue comes up after taking a 3 finger screenshot, but disabling may not be the only solution as this feature is quite useful also
What I have noticed is that after taking screenshot ghost touch is there till we use 1,2 or 3 fingers. Once we use 4, 5 or higher fingers the issue goes away.
Isn't it better to just touch screen with 4 fingers after taking a screenshot which somehow resets the ghost touch issue.
Have tried this solution with multi touch tester app

Mine is just fine even when 3 finger swipe screenshot is switched on

I can confirm that ghost touch issue still persist even when disabling three finger screenshot.
Mostly visible in pubg.

Great, fix worked

I didn't relize the issue but nice posting

Stop it! This is not an issue. It happens on mostly every phone that supports gestures. Test it on OnePlus 6 and you will get the same result.

GizmoFreak said:
Stop it! This is not an issue. It happens on mostly every phone that supports gestures. Test it on OnePlus 6 and you will get the same result.
Click to expand...
Click to collapse
it is software bug which creates inconvenient experience with touch screen.. this fix is just a workaround until official fix..

raj7749 said:
it is software bug which creates inconvenient experience with touch screen.. this fix is just a workaround until official fix..
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Click to collapse
Okay, show me how this affects your usage of phone. Don't show me on touch testing apps. Show me a real use problem.

GizmoFreak said:
Okay, show me how this affects your usage of phone. Don't show me on touch testing apps. Show me a real use problem.
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Click to collapse
lol.. i don't need to prove to you anything about this, don't care wht u think.
However ill tell for the benefits of the others, it was effecting me while playing games.. specially RPG games where multitouch is heavily use. I was seeing weird behaviours sometimes, when selecting troops.. thts how i came to know

raj7749 said:
lol.. i don't need to prove to you anything about this, don't care wht u think.
However ill tell for the benefits of the others, it was effecting me while playing games.. specially RPG games where multitouch is heavily use. I was seeing weird behaviours sometimes, when selecting troops.. thts how i came to know
Click to expand...
Click to collapse
Okay, please record a video of you playing and of course don't show me but share for the benefit of the community.

GizmoFreak said:
Okay, please record a video of you playing and of course don't show me but share for the benefit of the community.
Click to expand...
Click to collapse
xD, if needed will do M too lazy to do that for now

raj7749 said:
lol.. i don't need to prove to you anything about this, don't care wht u think.
However ill tell for the benefits of the others, it was effecting me while playing games.. specially RPG games where multitouch is heavily use. I was seeing weird behaviours sometimes, when selecting troops.. thts how i came to know
Click to expand...
Click to collapse
Exactly! There is no need to prove this issue because Google itself confirms that they have done a mistake by releasing it in Oreo and they have also promised to give a fix in later Pie updates. And people who wants proofs can look up in the internet about the "Multi touch Oreo Bug" problem and how it effects user experience rather than spamming here to make a point.

$hivaM Manav said:
Exactly! There is no need to prove this issue because Google itself confirms that they have done a mistake by releasing it in Oreo and they have also promised to give a fix in later Pie updates. And people who wants proofs can look up in the internet about the "Multi touch Oreo Bug" problem and how it effects user experience rather than spamming here to make a point.
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Click to collapse
Dude, google fixed the issue in the May or June patch and all other OEM's had to merge their builds to fix it. The problem is not there in MiA1 or MiA2.
Here is the bug:
http://en.miui.com/thread-3746297-1-1.html
Thanks

Maybe the original solution for 8.1 and P devices will work for this? It will either cause a bootloop, do nothing, or fix it... worth trying! Obviously an unlocked bootloader is needed for this (Magisk).

Mi Note 10 weird screen issue (ghost touch?)

Hi all,
Just got this Mi Note 10 today and while setting up the phone I started to get those weird screen touches..
Happened so often that I enabled 'Show Taps' via developer options and recorded it here:
https://imgur.com/a/T2Otpht
>> Is there anything I can do about this? Not sure if this is a Hardware or Software fault?
Any thoughts welcome!
thanks

tibrocks said:
Hi all,
Just got this Mi Note 10 today and while setting up the phone I started to get those weird screen touches..
Happened so often that I enabled 'Show Taps' via developer options and recorded it here:
https://imgur.com/a/T2Otpht
>> Is there anything I can do about this? Not sure if this is a Hardware or Software fault?
Any thoughts welcome!
thanks
Click to expand...
Click to collapse
Okay, this is weird. Which version is it? And did you have already tried to reset your device? If it's still there it's probably a hardware defect.

ItsBen12000 said:
Okay, this is weird. Which version is it? And did you have already tried to reset your device? If it's still there it's probably a hardware defect.
Click to expand...
Click to collapse
Model version M1910F4G
MIUI version MIUI Global 11.1.1 Stable (QFDEUXM)
Did a factory reset and was doing the same thing...

tibrocks said:
Model version M1910F4G
MIUI version MIUI Global 11.1.1 Stable (QFDEUXM)
Did a factory reset and was doing the same thing...
Click to expand...
Click to collapse
Well, I had the same MIUI version and region. I bet it's not a software problem. Just send it back

ItsBen12000 said:
Well, I had the same MIUI version and region. I bet it's not a software problem. Just send it back
Click to expand...
Click to collapse
Right, so no fix really... disappointing as the cameras are impressive

My device came shipped with Android Pie Based Miui 11, no screen weirdness. Just after the Android 10 updates that ghost touches appear. So I guess it's just software bug.

me too, sure software problem.

Thanks for the feedback, if software-related were you able to roll back to fix this?
Happy to try a workaround as I'm very reluctant to send it back..

worth a try though, but unfortunately Xiaomi didn't provide stock ROM specifically for my region so I left with no choice

Completely puzzled as I did a Factory Reset via Recovery and haven't seen the issue for past 2 days, I've left the screen touch tracing on and no 'ghost touch' was recorded..
so I don't know what to believe anymore, got an open return ticket but would hate to send it back without needing to..
how can I make sure issue is gone?

Hi, i had this problem 3 weeks ago, temporary solved with hard reset, worked perfectly until yesterday night when this problem went back.
Hard reset again, problem still there.
Someone solved it permanently?
It is really weird because, if i turn off/on the display, sometime works sometime not :S

The phone came with Android 9 and I started to face this after updating to Android 10. The issue is not extreme as shown in the video, it just the touch becomes slow to respond and hard to type fast with the keyboard. Turning off the screen and turning back on solves it temporarily sometimes.
I tried disabling on screen fingerprint and the problem seems to be reduced now. Definitely a software bug

I'm using Mi note 10 lite it also has same problem. Sometime touch freezing and after press power button automatically fix. Some time need to restart. And also one person told me he is fixed by this issue by turned off fingerprint sensor.

UnlimitedBB said:
The phone came with Android 9 and I started to face this after updating to Android 10. The issue is not extreme as shown in the video, it just the touch becomes slow to respond and hard to type fast with the keyboard. Turning off the screen and turning back on solves it temporarily sometimes.
I tried disabling on screen fingerprint and the problem seems to be reduced now. Definitely a software bug
Click to expand...
Click to collapse
I have the exact same problem as you, slow to respond and hard to type. Need to apply more force on the screen for it to respond. This happened randomly throughout the day but are more common during night time for me.
I think it has something to do with the screen lock pin or fingerprint, by changing the screen lock from ie pin to pattern or turning off fingerprint print seems to temporary fix the issue. Another solution is to reboot the phone. I'm using Note 10 Lite btw.

BengCurd said:
I have the exact same problem as you, slow to respond and hard to type. Need to apply more force on the screen for it to respond. This happened randomly throughout the day but are more common during night time for me.
I think it has something to do with the screen lock pin or fingerprint, by changing the screen lock from ie pin to pattern or turning off fingerprint print seems to temporary fix the issue. Another solution is to reboot the phone. I'm using Note 10 Lite btw.
Click to expand...
Click to collapse
I am using the Pro version. Looks like this issue is common for all the phone models in the Note 10 series. Yes, I have noticed that this issue often happens at night.

Try switching off MIUI optimization under Developer Options and restart your device. Then switch it On and restart again. This workaround solved my issue.
https://imgur.com/a/vbvsiyy

CharlesJFRq said:
Try switching off MIUI optimization under Developer Options and restart your device. Then switch it On and restart again. This workaround solved my issue.
https://imgur.com/a/vbvsiyy
Click to expand...
Click to collapse
This fixed the issue for a few days and it started to reappear again. When the issue appears, if I turn on Game Turbo for any app (eg: WhatsApp) that particular app doesn't have this touch issue. Looks like a software optimization or battery optimization of MIUI is causing this issue

UnlimitedBB said:
This fixed the issue for a few days and it started to reappear again. When the issue appears, if I turn on Game Turbo for any app (eg: WhatsApp) that particular app doesn't have this touch issue. Looks like a software optimization or battery optimization of MIUI is causing this issue
Click to expand...
Click to collapse
What firmware version are u in?
I'm currently at 11.0.16.0 and fortunately this issue did not yet reappeared after the workaround.
This is definitely a software ISSUE with MIUI.

CharlesJFRq said:
What firmware version are u in?
I'm currently at 11.0.16.0 and fortunately this issue did not yet reappeared after the workaround.
This is definitely a software ISSUE with MIUI.
Click to expand...
Click to collapse
MIUI 11.1.3.0 Global Stable

Will try out the MIUI optimization to see whether issue still arise. I'll see if my game turbo have the same issue as you too.
I'm currently at 11.0.7.0 (Mi Note 10 Lite)
Edit: Mi optimisation doesn't work for me but the Game Turbo trick do work.