SUMMARY STEPS TO REPRODUCE 1. Connect the monitor to one DVI-Slot at the docking station OBSERVED RESULT kwin or sddm crashing EXPECTED RESULT The monitor works as usual. SOFTWARE/OS VERSIONS Operating System: KDE neon User Edition KDE Plasma Version: 6.5.1 KDE Frameworks Version: 6.19.0 Qt Version: 6.9.2 Kernel Version: 6.14.0-34-generic (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-8665U CPU @ 1.90GHz Memory: 32 GiB of RAM (31.0 GiB usable) Graphics Processor: Intel® UHD Graphics 620 Manufacturer: LENOVO Product Name: 20N3SA4P00 System Version: ThinkPad T490 ADDITIONAL INFORMATION After the last update, the DVI monitor connection to the docking station no longer works. sddm/kwin crashes. The HDMI connection at the dock is working. The log says: ‘kwin_wayland_drm: failed to open drm device at \’\‘\n’ It's a docking station for ThinkPad T490 with Intel UHD Graphics 620 on KDE Neon.
As the message at the top of the summary says, if something crashed, we need a backtrace of it so we can figure out what's going on. Can you please attach a backtrace of the crash using the coredumpctl command-line program, as detailed in https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl ? Thanks.
With the upgrade to KDE 6.5.2, the problem has disappeared and can no longer be reproduced.