https://bugs.kde.org/show_bug.cgi?id=505107
Bug ID: 505107
Summary: Background flickers through to foreground when using
Display Stream Compression via DisplayPort
Classification: Plasma
Product: kwin
Version First unspecified
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: mikedaw...@gmail.com
Target Milestone: ---
SUMMARY
When using an nvidia RTX 3090 or RTX 4090 and DSC over Displayport, the
background will randomly flicker through to the foreground. This is especially
annoying in fullscreen Youtube videos.
I've noticed this bug for several years, so it was happening on KDE5 as well.
This has happened on every nvidia driver from 535 through 575. At first I
thought it was just an nvidia driver bug, but this does not happen in Gnome.
STEPS TO REPRODUCE
1. Use Display Stream Compression (high resolution and refresh rate) over
Displayport
2. Use NVidia card
3. Use Wayland
4. fullscreen a Youtube video and wait a minute (note it also happens to normal
windows during regular work, not watching videos)
OBSERVED RESULT
Background flickers through to the foreground
EXPECTED RESULT
no flickering
SOFTWARE/OS VERSIONS
CachyOS Kernel 6.15
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14
Qt Version: 6.9
ADDITIONAL INFORMATION
This has happened for years, so these versions listed here are not the cause
Switching to a lower refresh rate, or switching to Gnome solves the issue
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