phone flashes white screen to the left sometimes when on phone

[Alex Hobson1]

when i open up an app or use my phone to do anything sometimes it will keep flashing a white screen to the left like mad and it won't stop for about a few seconds or so is there any way to stop it from doing this think it has something to do with package installer but not sure

 

[B. Diddy]

Which Xiaomi phone? Can you try to record the screen when it's doing that and post where we can see it?

You mentioned "package installer" -- are there any sideloaded apps on the phone, or is the phone rooted or otherwise modified?

 

[mustang7757]

Do you have developer settings enabled ?

 

[Alex Hobson1]

its a redmi note 9s there are no sideloaded apps on the phone and it is not rooted also developer settings was enabled just turned it off i will try to record the screen when it happens again

what are sideloaded apps anyway

 

[belodion]

what are sideloaded apps anyway

For our present purposes, sideloading refers to apps downloaded from sources other than the Play Store.

The full meaning is broader than that.

As a precaution, a backup of your personal data may be a good idea. From your description, I doubt that device failure is very likely, but who knows?

 

[Alex Hobson1]

well i don't have any other apps which are not from the play store

 

[mustang7757]

its a redmi note 9s there are no sideloaded apps on the phone and it is not rooted also developer settings was enabled just turned it off i will try to record the screen when it happens again

what are sideloaded apps anyway

Maybe something in there was accidentally touched ? Reboot the device

 

[B. Diddy]

Does it happen in Safe Mode? https://www.mi.com/global/support/faq/details/KA-07889/#:~:text=1.,corner of the phone screen.

 

[Madd62]

If it's not Floating Windows - Sidebar, I would send a query via Services and Feedback with a Log ideally.
Also try a Display test in the CIT panel. About - Detailed Info - Kernel Version (tap several times)

Other than that I don't know.

I think you will still get a response in Services and Feedback if you wait for it.

 

[Alex Hobson1]

i just did it about a few seconds ago

 

[Alex Hobson1]

If it's not Floating Windows - Sidebar, I would send a query via Services and Feedback with a Log ideally.
Also try a Display test in the CIT panel. About - Detailed Info - Kernel Version (tap several times)

Other than that I don't know.

I think you will still get a response in Services and Feedback if you wait for it.

where is display test in CIT panel because it isn't showing

 

[Madd62]

It probably won't show anything if that part of the screen works normally most of the time.
It's possible you don't have CIT tests **on the Redmi or your MIUI version*(I don't know what CIT means).
Getting there is like for Developer Options, but About Phone - Detailed Info and Spec - Kernel Version - tap multiple times.

 

[Alex Hobson1]

it does have CTI tests but doesn't show display

 

[Alex Hobson1]

i will keep an eye out and see if it does it again

 

[Madd62]

it does have CTI tests but doesn't show display

Ah OK. Yours has an LCD display mine is an Oled / Amoled. I can't see why that makes a difference but it just displays three single colours in order so maybe it's an Oled colour test thing.

What you describe does ring a bell, but I can't remember anything about it. Was it a rectangular box with rounded corners. It may come back to me.

As B. Diddy suggested, try leaving it in Safe mode for a while when you don't need to use downloaded apps. It still functions as a smartphone.

You can screen record as a video, well mine can, and that would be helpful if you can catch it then.
I think that's what, again, B. Diddy was referring to. The white part may or may not appear in a screen recording or a screenshot though.

If I remember anything I'll post here.


*also you may have seen on the CIT screen there is an overflow menu of other "tools" with the 3 dots upper right, but Display is unlikely to be there.

 

[mustang7757]

If it's a flicker like this check anti flicker mode

 

[Alex Hobson1]

no it

If it's a flicker like this check anti flicker mode

no it isn't that

 

[Alex Hobson1]

i will keep an eye out and see if it does it again for a few days and I will get back to you to see if it is fixed or not

 

[mustang7757]

Ok...screen record it

 

[Alex Hobson1]

i'll try to