https://bugs.kde.org/show_bug.cgi?id=422018
Bug ID: 422018
Summary: Kwin OpenGL Graphical Glitches on Startup
Product: kwin
Version: 5.18.5
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: kwin-bugs-n...@kde.org
Reporter: kingofgamesy...@gmail.com
Target Milestone: ---
SUMMARY
On my system, using OpenGL 2.0 or OpenGL 3.1 as the rendering backend
introduces the following glitches during boot:
- The cursor will vanish after a short period of time with no movement
* Upon moving the cursor after this occurrence, a chunk of the screen around
the cursor will temporarily revert to the way it was displayed at the time the
cursor vanished.
- The cursor may have a trail of cursors behind it (does not always occur).
- Display settings are configured wrong (my second and third monitor are
sometimes not detected, or only one of the two). NOTE: This is likely due to
DisplayLink, and is probably outside the context of this ticket.
There are two workarounds I have discovered for this bug.
1. Using XRender for the Rendering backend will fix this bug (though at the
cost of disabling several desktop effects).
2. Logging out (but not rebooting!) and logging back in will fix the issue.
STEPS TO REPRODUCE
1. Install Manjaro KDE on a system using Skylake Integrated Graphics (assumed -
only one system tested)
2. Use OpenGL 3.1 as the rendering backend
3. Reboot
OBSERVED RESULT
The aforementioned cursor glitches (vanishing, cursor trail).
EXPECTED RESULT
No such glitches.
SOFTWARE/OS VERSIONS
Windows: N/A
macOS: N/A
Linux/KDE Plasma: Manjaro KDE stable
(available in About System)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.14.2
ADDITIONAL INFORMATION
inxi -Fxzc0: https://pastebin.com/m2Zrihng
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