Bug 477099 - Fullscreen games tearing with a thick black bar
Summary: Fullscreen games tearing with a thick black bar
Status: RESOLVED UPSTREAM
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (other bugs)
Version First Reported In: 5.27.9
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-11-16 14:24 UTC by Duncan Vriend
Modified: 2023-11-16 14:38 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Black bar screen tear (3.70 MB, image/jpeg)
2023-11-16 14:24 UTC, Duncan Vriend 		Details
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Description Duncan Vriend 2023-11-16 14:24:31 UTC 
Created attachment 163217 [details]
Black bar screen tear

SUMMARY
When "allow tearing" is enabled, a tear during fullscreen gameplay shows up as a big black bar, instead of 2 different frames being displayed by different parts of the screen. (see attachment)


STEPS TO REPRODUCE
1. Display fullscreen game without V-sync
2. Let frame rate fall below monitors current refresh rate (set to 120Hz (it can do 144Hz) in my case)

OBSERVED RESULT
A black bar appears where I'd expect a "screen tear" (happens frequently, is annoying)

EXPECTED RESULT
The old frame is partially shown and the new frame is partially shown


SOFTWARE/OS VERSIONS
Linux: 6.6.1
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.112.0
Qt Version: 5.15.11

ADDITIONAL INFORMATION

GPU: GTX1060 6GB (proprietary NVIDIA drivers)
Comment 1 Zamundaaa 2023-11-16 14:38:51 UTC 
This is a NVidia driver bug, and is not related to screen tearing. See https://gitlab.freedesktop.org/xorg/xserver/-/issues/1317 for more details