https://bugs.kde.org/show_bug.cgi?id=489367
Bug ID: 489367
Summary: Connecting USB-C dock with external displays fails to
activate them and gives a black screen
Classification: Plasma
Product: kwin
Version: 6.1.0
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: m.lince...@gmail.com
Target Milestone: ---
Created attachment 171125
--> https://bugs.kde.org/attachment.cgi?id=171125&action=edit
Log from the crash
SUMMARY
Sometimes (more often than not) when connecting a USB-C dock with two external
displays, the two displays fail to activate. Whether the issue occurs seems
totally random. Sometimes disconnecting and reconnecting the dock fixes the
issue, sometimes multiple iterations are required. Sometimes restarting the
system and/or plasmashell seems to help (but this is anectodal could still be
random).
STEPS TO REPRODUCE
1. Connect USB-C dock with external displays
2. Configure display setup in "Display Configuration". In my case, the laptop
screen is set to deactivated when the external displays are connected.
3. Work normally.
4. Disconnect dock and move on with your life.
5. Get back to work and connect the USB-C dock.
OBSERVED RESULT
Laptop display deactivates, but external display do not activate and stay
black.
EXPECTED RESULT
External displays activate regularly upon connection.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.0
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.1
Kernel Version: 6.9.5-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: Dell Inc.
Product Name: Latitude 7490
ADDITIONAL INFORMATION
A system log is attached. This was taken on a fresh boot. At the first
connection of the USB-C dock, the displays failed to activate. Disconnecting
and reconnecting the dock fixed the issue at the first try. All this is
captured in the log.
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