Xorg crash when zooming or changing brightness in Plasma/X11 session
Xorg crashes quite often lately. It triggers randomly, mostly from changing brightness or volume, or using KWin zoom effect. This issue was first reported by me at KDE bugzilla: https://bugs.kde.org/show_bug.cgi?id=447669. I am using Arch Linux (btw) which doesn't ship debug symbols, so please forgive me for comically useless backtrace.
❯ sudo coredumpctl gdb /usr/lib/Xorg
PID: 630 (Xorg)
UID: 0 (root)
GID: 0 (root)
Signal: 6 (ABRT)
Timestamp: Sat 2022-02-05 17:32:18 MSK (5min ago)
Command Line: /usr/lib/Xorg -nolisten tcp -background none -seat seat0 vt1 -auth /var/run/sddm/{5cf38940-b7bb-4172-ba39-58aa7d172d4c} -noreset -displayfd 17
Executable: /usr/lib/Xorg
Control Group: /system.slice/sddm-plymouth.service
Unit: sddm-plymouth.service
Slice: system.slice
Boot ID: 42619d84d5764e7391fc094c8b91d6b4
Machine ID: 01cb509b8fa644f9983f3f3d34b184c7
Hostname: orange
Storage: /var/lib/systemd/coredump/core.Xorg.0.42619d84d5764e7391fc094c8b91d6b4.630.1644071538000000.zst (present)
Disk Size: 3.6M
Message: Process 630 (Xorg) of user 0 dumped core.
[...]
(gdb) bt
#0 0x00007fdcc84f8d22 in raise () at /usr/lib/libc.so.6
#1 0x00007fdcc84e2862 in abort () at /usr/lib/libc.so.6
#2 0x000055f5c38639b0 in System ()
#3 0x000055f5c38654f5 in FatalError ()
#4 0x000055f5c386aeca in ()
#5 0x00007fdcc86a0870 in <signal handler called> () at /usr/lib/libpthread.so.0
#6 0x000055f5c38f52d8 in ()
#7 0x000055f5c379d375 in ()
#8 0x000055f5c379d9bc in ()
#9 0x000055f5c379ebb3 in ()
#10 0x000055f5c381cd4b in ()
#11 0x000055f5c38567b4 in XkbHandleActions ()
#12 0x000055f5c38ecf12 in ()
#13 0x000055f5c3844c7e in ()
#14 0x000055f5c385e404 in ()
#15 0x000055f5c385e712 in WaitForSomething ()
#16 0x000055f5c374c83b in ()
#17 0x00007fdcc84e3b25 in __libc_start_main () at /usr/lib/libc.so.6
#18 0x000055f5c374d75e in _start ()
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2
Kernel Version: 5.15.11-arch2-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2
xorg-server: 21.1.3-1
xorg-xinput: 1.6.3-2
xorg-xrandr: 1.5.1-2
nvidia: 510.47.03-2
nvidia-utils: 510.47.03-3