https://bugs.kde.org/show_bug.cgi?id=464732
Bug ID: 464732
Summary: plasmashell hangs at a futex related to
QXcbConnection::xi2HandleDeviceChangedEvent
Classification: Plasma
Product: plasmashell
Version: 5.25.5
Platform: Ubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: generic-crash
Assignee: plasma-b...@kde.org
Reporter: nfsmw...@gmail.com
Target Milestone: 1.0
Created attachment 155554
--> https://bugs.kde.org/attachment.cgi?id=155554&action=edit
backtrace
SUMMARY
Plasmashell and applications freeze randomly, none of them respond to keyboard
or mouse input. I use my computer everyday and this happens about twice a week.
It only happens since my upgrade from Ubuntu 22.04 to 22.10.
I switched to tty and used `sudo strace -p` on the plasmashell process. It
showed that plasmashell stucked at a futex call. I loaded the debug symbols and
attached the process with gdb. It showed that plasmashell stuck at a
xcb_wait_for_reply call inside QXcbConnection::xi2HandleDeviceChangedEvent.
However, I did not plug / unplug any device from the computer at the time of
freeze. This freeze also happens when the computer (Thinkpad X13 Gen 2 AMD) is
not connected to any external device (no bluetooth device either).
The backtrace is attached.
I understand this might be hard to debug, so please tell me things I can try
and information to collect, and I will collect them when the next crash
happens.
STEPS TO REPRODUCE
1. Use desktop normally
OBSERVED RESULT
Desktop freezes
EXPECTED RESULT
Desktop not freeze
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Ubuntu 22.10 (System installed via Ubuntu installer, then apt
install kubuntu-desktop afterwards)
(available in About System)
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
ADDITIONAL INFORMATION
Graphics platform: X11
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