https://bugs.kde.org/show_bug.cgi?id=462625
Bug ID: 462625
Summary: Black screen on non-primary gpu displays (usb adapters
and iGPU + dGPU)
Classification: Plasma
Product: kwin
Version: unspecified
Platform: OpenSUSE
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: raffa...@zoho.com
Target Milestone: ---
SUMMARY
When connecting a monitor to a secondary gpu with a wayland session, it results
in a black screen with laggy mouse. The mouse changes based on what it would
hoover (text, resize handles, ...).
journalctl shows a lot of lines like this:
`kwin_wayland_drm: failed to import gbm_bo for multi-gpu usage: Function not
implemented`
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: OpenSUSE Tumbleweed with KDE unstable repos (bug not present
on system repos 5.26.4)
(available in About System)
KDE Plasma Version: 5.26.80
KDE Frameworks Version: 5.101.0
Qt Version: 5.15.7
ADDITIONAL INFORMATION
Observed on 6800H + 6600M (with mux switch). The bug only occurs while using
the integrated gpu as primary or an usb to hdmi adapter is used.
X11 works fine.
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