https://bugs.kde.org/show_bug.cgi?id=523636
Bug ID: 523636
Summary: Switching users and then logging out of the user being
switched to causes a hard system freeze that can't be
fixed without a forced power-off
Classification: Plasma
Product: plasmashell
Version First 6.7.3
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: User Switcher widget
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
Created attachment 194683
--> https://bugs.kde.org/attachment.cgi?id=194683&action=edit
Logs that show the moment the crash is triggered.
DESCRIPTION
When switching users, if the user decides to log out of the user that they
switched too, it freezes the system irrecoverably. This seems to be (according
to the logs) due to powerdevil being triggered and causing lots of random udev
events(?). But I am marking this as a user switcher bug as this is consistently
triggered by the action of logging out of another user after switching users.
STEPS TO REPRODUCE
Assuming the user is using Plasma Login Manager
1. Log into a user
2. Switch user to another user
3. Log out of the other user
OBSERVED RESULT
The system fatally freezes, requiring a hard reboot to fix the system
EXPECTED RESULT
System should not fatally freeze.
SOFTWARE/OS VERSIONS
MESA: warning: Support for this platform is experimental with Xe KMD, bug
reports may be ignored.
Operating System: Arch Linux
KDE Plasma Version: 6.7.3
KDE Frameworks Version: 6.28.0
Qt Version: 6.11.1
Kernel Version: 6.18.40-3-lts (64-bit)
Graphics Platform: Wayland
Processors: 14 × Intel® Core™ Ultra 5 225H
Memory: 16 GiB of RAM (14.5 GiB usable)
Graphics Processor: Intel® Graphics
ADDITIONAL INFORMATION
1. Reproducible on latest stable Arch Linux kernel (7.1.5.arch1-2) and LTS
kernel (mentioned above).
2. Tried swapping Intel's GPU drivers between xe and i915 and was still able to
reproduce the issue.
3. Adding users to the `i2c` group didn't fix the issue.
4. My kernel command line: `loglevel=3 quiet rd.luks.uuid=UUID-XXXX
rd.luks.name=UUID-XXXX=root root=UUID=UUID-XXXX rw intel_iommu=on iommu=force
zswap.enabled=0 lockdown=confidentiality iommu.strict=1 i915.force_probe=!7d51
xe.force_probe=7d51`
5. Sometimes instead of a crash I am kicked out of my wayland session and back
to the login manager.
6. Logging out of a user and then switching the user does not seem to cause an
issue.
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