Hi, I have tried the command sudo coredumpctl -1 gdb Xorg, and it produces:
PID: 16835 (Xorg)
UID: 0 (root)
GID: 0 (root)
Signal: 11 (SEGV)
Timestamp: Tue 2025-02-18 16:10:04 CST (4h 46min ago)
Command Line: /usr/lib/Xorg -nolisten tcp -background none -seat seat0 vt1 -auth /run/sddm/xauth_KhBsCq -noreset -displayfd 17
Executable: /usr/lib/Xorg
Control Group: /system.slice/sddm.service
Unit: sddm.service
Slice: system.slice
Boot ID: b2e4133c0dd448dea2a2267b9a8adb01
Machine ID: 546e9c9b93f84da482914cbbf6aa1697
Hostname: arch
Storage: /var/lib/systemd/coredump/core.Xorg.0.b2e4133c0dd448dea2a2267b9a8adb01.16835.1739866204000000.zst (present)
Size on Disk: 11.2M
Message: Process 16835 (Xorg) of user 0 dumped core.
Stack trace of thread 16835:
#0 0x00007c58e09548ef n/a (libvnc.so + 0x348ef)
#1 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#2 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#3 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#4 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#5 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#6 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#7 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#8 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#9 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#10 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#11 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#12 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#13 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#14 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#15 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#16 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#17 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#18 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#19 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#20 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#21 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#22 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#23 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#24 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#25 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#26 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#27 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#28 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#29 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#30 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#31 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#32 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#33 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#34 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#35 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#36 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#37 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#38 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#39 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#40 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#41 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#42 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#43 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#44 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#45 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#46 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#47 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#48 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#49 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#50 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#51 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#52 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#53 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#54 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#55 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#56 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#57 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#58 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#59 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#60 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#61 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#62 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#63 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
Stack trace of thread 16874:
#0 0x00007c58e0954946 n/a (libvnc.so + 0x34946)
#1 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#2 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#3 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#4 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#5 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#6 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#7 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#8 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#9 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#10 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#11 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#12 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#13 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#14 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#15 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#16 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#17 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#18 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#19 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#20 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#21 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#22 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#23 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#24 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#25 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#26 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#27 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#28 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#29 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#30 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#31 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#32 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#33 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#34 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#35 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#36 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#37 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#38 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#39 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#40 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#41 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#42 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#43 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#44 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#45 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#46 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#47 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#48 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#49 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#50 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#51 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#52 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#53 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#54 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#55 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#56 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#57 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#58 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#59 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#60 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#61 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#62 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
#63 0x00007c58e0954949 n/a (libvnc.so + 0x34949)
ELF object binary architecture: AMD x86-64
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Reading symbols from /usr/lib/Xorg...
Reading symbols from /usr/lib/debug/usr/lib/Xorg.debug...
warning: Can't open file /memfd:xorg (deleted) during file-backed mapping note processing
warning: Can't open file /SYSV00000000 (deleted) during file-backed mapping note processing
warning: Can't open file /memfd:/.nvidia_drv.XXXXXX (deleted) during file-backed mapping note processing
[New LWP 16835]
[New LWP 16874]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/lib/Xorg -nolisten tcp -background none -seat seat0 vt1 -auth /run/sddm/xauth_KhBsCq -noreset -displayfd 17'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007c58e09548ef in vncHooksMoveCursor (dev=0x644c17428e20, screen=0x644c16c24590, x=3720, y=242) at ../../include/privates.h:164
164 if (key->size)
[Current thread is 1 (Thread 0x7c58e0a2ea00 (LWP 16835))]
(gdb)
And then I typed bt to print the backtrace:
#0 0x00007c58e09548ef in vncHooksMoveCursor (dev=0x644c17428e20, screen=0x644c16c24590, x=3720, y=242) at ../../include/privates.h:164
#1 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#2 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#3 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#4 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#5 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#6 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
... (same lines)
#261859 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#261860 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#261861 0x00007c58e0954949 in vncHooksMoveCursor (dev=<optimized out>, screen=<optimized out>, x=<optimized out>, y=<optimized out>) at /usr/src/debug/tigervnc/tigervnc/unix/xserver/hw/vnc/vncHooks.c:1265
#261862 0x0000644bea6d74a9 in miPointerUpdateSprite (pDev=0x644c17428e20) at ../xorg-server/mi/mipointer.c:431
#261863 mieqProcessInputEvents () at ../xorg-server/mi/mieq.c:571
#261864 0x0000644bea7fe9b3 in ProcessInputEvents () at ../xorg-server/hw/xfree86/common/xf86Events.c:143
#261865 0x0000644bea6c6058 in Dispatch () at ../xorg-server/dix/dispatch.c:508
#261866 dix_main (argc=13, argv=0x7fffb4fd8b78, envp=<optimized out>) at ../xorg-server/dix/main.c:272
#261867 main (argc=13, argv=0x7fffb4fd8b78, envp=<optimized out>) at ../xorg-server/dix/stubmain.c:34