Jagannathan Tiruvallur Eachambadi <> changed:

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--- Comment #1 from Jagannathan Tiruvallur Eachambadi <> 
(In reply to pbs3141 from comment #0)
> 1. Change the tearing prevention from "Full screen repaints" to "Automatic"
> or vice-versa, and Apply.
> 2. Move some windows around: observe full-screen black flickering, other
> windows being partially painted over the active window while typing, and
> general artefacts.

Can confirm this. Full scale black flickering happens when there are no
maximized windows in the background. General bad artefacts happen either way.
> Either
> 3a. Logout, and confirm with Ok at the logout screen: session freezes with
> the logout screen stuck on the screen.

I was able to logout but kwin crashed with a truncated core dump so no luck.
> Or
> 3b. Keep triggering the snap animation by snapping a window against a screen
> edge but not letting go: observe snap animation displays a garbage texture.
> Continue for about 10 seconds: graphics freezes, cpu goes to 100%, and disk
> starts swapping.

The "garbage texture" is reproducible but cpu remained quiet.

> 4. Try to VT switch: nothing happens.
> 5. Trigger SysRq+I: get a VT, but it is frozen, and a reboot is necessary,
> even though kernel is responsive.
>    (If you are lucky, you may get the SDDM greeter, and you can login again
> normally.)

This was not reproducible. It is probably specific to your hardware. Please
mark the bug confirmed.

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