https://bugs.kde.org/show_bug.cgi?id=422415
David Edmundson changed:
What|Removed |Added
Status|REPORTED|RESOLVED
Resolution|---
https://bugs.kde.org/show_bug.cgi?id=422415
--- Comment #10 from Konstantin ---
Unfortunately that was just mitigation - lines are there. The only way to fix
this for me was to compile this mr
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/24/ which has
TearFree code and turn off
https://bugs.kde.org/show_bug.cgi?id=422415
--- Comment #9 from Konstantin ---
I have disabled haveged and things are much much better. I rarely see the
lines. It seems the issue is with the kernel since I also test this with
compton as well.
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--- Comment #8 from Konstantin ---
And in a twist of the events it turned out I can reliably reproduce with this
command:
dd if=/dev/random of=/dev/null bs=4096 count=100 oflag=sync
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--- Comment #7 from Konstantin ---
Here are more findings - I definitely could see the problem when I execute
update-grub. I see this only when video is playing in background (firefox). If
I use Xrander there are no issues. If I disable the vsync no
https://bugs.kde.org/show_bug.cgi?id=422415
--- Comment #6 from Konstantin ---
I have also tried to disable all effects and that did not help. When I do dd
if=/dev/sda of=/dev/null problem is more prominent.
What should I try next?
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--- Comment #5 from Konstantin ---
I remember now - I am not using xrender since tearing is very bad (with all
possible vsync options).
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--- Comment #4 from Konstantin ---
(In reply to Vlad Zahorodnii from comment #3)
> > 1. Make sure compositor is enabled with OpenGL 2.1 and vsync set to auto.
>
> If you switch to another render backend, e.g. XRender, or disable
> compositing
https://bugs.kde.org/show_bug.cgi?id=422415
--- Comment #3 from Vlad Zahorodnii ---
> 1. Make sure compositor is enabled with OpenGL 2.1 and vsync set to auto.
If you switch to another render backend, e.g. XRender, or disable compositing
altogether, are you still able to see the visual
https://bugs.kde.org/show_bug.cgi?id=422415
--- Comment #2 from Konstantin ---
Additionally the white lines show briefly and go away very fast. They are
noticeable when you play video with black background.
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--- Comment #1 from Konstantin ---
Created attachment 129024
--> https://bugs.kde.org/attachment.cgi?id=129024=edit
Visualization of the issue.
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