Bug 510994 - kde/sddm crashes when using KVM
Summary: kde/sddm crashes when using KVM
Status: RESOLVED UNMAINTAINED
Alias: None
Product: kde
Classification: I don't know
Component: general (other bugs)
Version First Reported In: unspecified
Platform: Other Linux
: NOR crash
Target Milestone: ---
Assignee: Unassigned bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-10-24 05:08 UTC by EntranceJew
Modified: 2025-10-24 07:21 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
crash report thing (20.63 KB, text/x-log)
2025-10-24 05:08 UTC, EntranceJew
Details

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Description EntranceJew 2025-10-24 05:08:17 UTC
Created attachment 186071 [details]
crash report thing

SUMMARY
kde plasma6 not stable when switching desktops

STEPS TO REPRODUCE
1. use a KVM to switch away from a plasma6 session

OBSERVED RESULT
 KWIN crashed, all programs are gone

EXPECTED RESULT
KWIN exists, no programs are gone

SOFTWARE/OS VERSIONS
Operating System: NixOS 25.05
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.2
Kernel Version: 6.12.54 (64-bit)
Graphics Platform: Wayland
Processors: 16 × 11th Gen Intel® Core™ i9-11900K @ 3.50GHz
Memory: 125.6 GiB of RAM
Graphics Processor 1: AMD Radeon Graphics
Graphics Processor 2: Intel® Graphics

ADDITIONAL INFORMATION
i just swapped away from an nvidia 3070 Ti, which was also demonstrating this issue

every time it breaks i press the report crash button but none of the changelogs said anything about this sort of issue / it keeps happening so i figure that might be broken also.

here are logs of me causing this to happen over and over while I attempt to recreate it with sway, and notably, sway does not cause the issue when i run it from a tty, kde experiences the issue when i run it from a tty with startplasma-wayland

https://gist.github.com/EntranceJew/0882d77db4325eb409e3974d4aec2ec1
https://gist.github.com/EntranceJew/a85df0c0f4d1e31555d3ebc375d4074a
https://gist.github.com/EntranceJew/ed574767db9cbca7b5a954b6e3c6f6c4
https://gist.github.com/EntranceJew/739d4b55b17fbd75f0d833c5c0c92114
Comment 1 Harald Sitter 2025-10-24 07:21:39 UTC
Thank you for your bug report!
However Plasma 6.3 no longer receives updates or maintenance from KDE; active versions are 6.5 or newer. Please upgrade to an active version as soon as your distribution makes it available to you. Plasma is a fast-moving project, and bugs in one version are often fixed in the next one.
If you need help with Plasma 6.3, please contact your distribution, who bears the responsibility of providing help for older releases that are no longer receiving updates from KDE.
If you can reproduce the issue after upgrading to an active version, feel free to re-open this bug report.
Thanks for understanding!