https://bugs.kde.org/show_bug.cgi?id=414626
Bug ID: 414626
Summary: kwin_wayland on DisplayLink/udl turns screen off, and
back on every frame
Product: kwin
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: bluescreenaven...@gmail.com
Target Milestone: ---
SUMMARY
STEPS TO REPRODUCE
Need a Displaylink 2 device, (one that uses the UDL device
start kwin_wayland on the displaylink device. I usually move the main
integrated card0 into another seat, so that the DisplayLink card is the only
dri device in seat0
start a simple application that doesn't change often, like xterm, or konsole.
Press a key, or move the mouse. Observe the screen switch off, then back on
OBSERVED RESULT
Nothing interesting appears in the stdio/stderr log. I'm not sure the correct
QT_LOGGING* variables to export...
EXPECTED RESULT
Weston runs on UDL, (the GL render works with a mesa patch workaround), but it
runs with the --use-pixman flag, so I'd expect it to run like Weston.
It needs a newer kernel (from past some 5.something version that I forget.)
Nothing worked at ALL before on UDL
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux 5.3.0 (Debian Buster (with the kernel from Debian
Bullseye)
KDE Plasma Version: Master
KDE Frameworks Version: Master
Qt Version: 5.14
ADDITIONAL INFORMATION
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