https://bugs.kde.org/show_bug.cgi?id=444940
Bug ID: 444940
Summary: mesa 21.2.4-1 makes graphical desktop (plasma)
unusable with compositor disables
Product: kwin
Version: 5.23.0
Platform: Debian testing
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: chris...@gmx.de
Target Milestone: ---
After updating mesa from 20.3.5 to 21.2.4 in bookworm my graphical KDE plasma
5.21 and now 5.23 under x11 renders unusable if in Settings > Display and
Monitor > Compositor > Enable compositor on startup is turned off (and system
restarted) . There are many more or less longer horizontal lines
flying/flickering around, and changes of content, like typing text within a
terminal, makes just written characters unreadable. The system is very slow to
redraw the characters afterwards. Highlighting of elements like menus is slow
and ugly (also with flickering lines).
If 'Enable compositor on startup' is on, then there seem to be no problems.
Also with mesa 20.3.5 and plasma 5.21 there are no problems, even with the
swith off. Cannot check that for plasma 5.23, as it requires the new(er) mesa
version.
In a similar but virtualized with kvm installation there seem to be no such
problems, with all cominations of above mentioned mesa and plasma versions and
switch on or off.
STEPS TO REPRODUCE
1. swtich off Settings > Display and Monitor > Compositor > Enable compositor
on startup
2. restart
3. login
4. open a terminal and start writing or hover with mous cursors over menue
items
Operating System: Debian GNU/Linux
KDE Plasma Version: 5.23.0
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Kernel Version: 5.14.0-2-amd64 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700 CPU @ 3.40GHz
Memory: 31.2 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 530 (rev 06)
$dpkg -l | grep mesa
ii libegl-mesa0:amd64 21.2.4-1
amd64 free implementation of the EGL API -- Mesa vendor library
ii libgl1-mesa-dri:amd64 21.2.4-1
amd64 free implementation of the OpenGL API -- DRI modules
ii libgl1-mesa-glx:amd64 21.2.4-1
amd64 transitional dummy package
ii libglapi-mesa:amd64 21.2.4-1
amd64 free implementation of the GL API -- shared library
ii libglu1-mesa:amd64 9.0.1-1
amd64 Mesa OpenGL utility library (GLU)
ii libglx-mesa0:amd64 21.2.4-1
amd64 free implementation of the OpenGL API -- GLX vendor library
ii libosmesa6:amd64 21.2.4-1
amd64 Mesa Off-screen rendering extension
ii mesa-utils 8.4.0-1+b2
amd64 Miscellaneous Mesa GL utilities
ii mesa-va-drivers:amd64 21.2.4-1
amd64 Mesa VA-API video acceleration drivers
ii mesa-vdpau-drivers:amd64 21.2.4-1
amd64 Mesa VDPAU video acceleration drivers
ii mesa-vulkan-drivers:amd64 21.2.4-1
amd64 Mesa Vulkan graphics drivers
My original debian bug entry can be found here: https://bugs.debian.org/998386
Thanks,
Chris
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