https://bugs.kde.org/show_bug.cgi?id=470383
Bug ID: 470383
Summary: Displays connected through USB-C Dock give Black
Display
Classification: Plasma
Product: kwin
Version: 5.27.5
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: sfal...@cloverleaf-linux.org
Target Milestone: ---
Using a Lenovo Thinkpad T16 AMD, and Lenovo Universal USB-C Dock, a
plasma-wayland session gives me no output to the displays. kscreen *sees* the
displays there, but the displays remain blank. This behavior is the same
whether I have the dock and displays plugged in while booting, or if I plug the
dock into an already booted plasma-wayland session.
STEPS TO REPRODUCE
1. Plug displays via displayport cables into USB-C Dock
2. Plug Dock into Laptop
OBSERVED RESULT
No Output to dock connected displays, but all other dock functions work (audio
passthrough, mouse/keyboard, etc), Kscreen reports the displays are there and
enabled, but displays remain blank.
EXPECTED RESULT
Output of Graphical desktop to dock attached displays
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed
(available in About System)
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.5.19
ADDITIONAL INFORMATION
This behavior is the same for me on both openSUSE Tumbleweed, and Fedora 38, so
it doesn't appear to be a distro specific issue. Not that it matters to
wayland, but using plasma-x11 also is problematic. The Dock works *fine* and
as expected in Gnome 44, for both X11 and Wayland sessions, on both openSUSE
and Fedora
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