https://bugs.kde.org/show_bug.cgi?id=479387
Bug ID: 479387
Summary: kwin_wayland crashes when thunderbolt dock with
external monitors connected
Classification: Plasma
Product: kwin
Version: 5.27.10
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: miren_ra...@yahoo.co.uk
Target Milestone: ---
Created attachment 164663
--> https://bugs.kde.org/attachment.cgi?id=164663&action=edit
gdb session with backtrace
SUMMARY
Most times I connect my laptop to a Dell WD22TB4 thunderbolt dock with 2
external screens (both 4K), kwin_wayland crashes. I can consistently reproduce
the problem using the steps below and usually reproduce it if I connect the
laptop to the dock some time after logging in.
For context, this dock is at work. Before the break over the holidays, I had no
issues with this set up and only started experiencing it after I came back to
work. During this break, I upgraded the KDE Plasma stack from 5.27.9 to 5.27.10
(and related KDE framework dependencies) which is where I suspect the problem
comes from.
My normal screen set up with the dock connected is to have both monitors
enabled at 125% scaling (side-by-side) and to disable the laptop screen. I have
tried modifying this set up by enabling the laptop screen as well and setting
the display scaling on the external screens to 100% but I still have the same
problem. I have also tried disconnecting 1 screen.
STEPS TO REPRODUCE
1. Turn on laptop with dock connected and external monitors to dock.
2. Log into my account from SDDM login screen.
OBSERVED RESULT
kwin_wayland crashes almost immediately and I am eventually left with black
screens and a cursor.
EXPECTED RESULT
No crash.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 39
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.111.0
Qt Version: 5.15.11
Kernel Version: 6.6.8-200.fc39.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × 12th Gen Intel® Core™ i7-1260P
Memory: 31.1 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
Manufacturer: Framework
Product Name: Laptop (12th Gen Intel Core)
System Version: A6
ADDITIONAL INFORMATION
Please find a stack trace generated from the coredump using gdb attached.
Please let me know if there is any further information I can provide to help
debug this.
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