Krita flickering and wiggling

[Sephi]

Hi,

I already made a post on this forum a few months ago, and got great help so here I am again because the issue I had ended up not really solved.
I am posting for my girlfriend : she uses Krita a lot, and has a dual monitor setup (one HP monitor, nothing special there, and an XP Pen 13.3 Pro tablet). On her new PC, she has been having a weird bug with Krita : regularly (and it seems, randomly too), two things can happen : Krita can just flicker to a black screen for like, one frame, causing an annoying black flash AND Krita’s window can also start “wiggling”. By that I mean that the window will sometimes reduce itself from 1 line of pixel at the bottom.

She found a “fix” to those two issues it seems : disabling hardware acceleration. The problem with this is that she then gives up computing power, and she’d like to keep this enabled without having this weird bug.
Here is a link to the old post, some solution were tried with no success, and after a while of testing, the solution we thought worked ended up wrong : Krita window wiggling while drawing

She uses Krita 5.1.5 (she downgraded from 5.2.3 to see if the bug would go away : it didn’t).
Please feel free to ask for more information if needed, and thank you for reading !

[Takiro]

@Sephi

Krita can just flicker to a black screen for like, one frame,

Is it only Krita or is it the whole screen that goes black?

@Sephi

Krita’s window can also start “wiggling”. By that I mean that the window will sometimes reduce itself from 1 line of pixel at the bottom.

Does this also happen when Krita is not maximized (full size) and only takes up a part of the screen (not touching the task bar). And does it happen when Krita is in Full-Screen mode (not the same thing as just maximized) as well?

Did the old fix of changing the graphics settings to OpenGL or Direct3D not help anymore?

Is the graphics card driver installed and up-to-date. It is really weird that it happens on a new PC too.

Is Window’s UI scaling active?