I'm seeing the same error with a Xubuntu 22.04 VM.
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https://bugs.launchpad.net/bugs/1980889
Title:
X crashes with qxl(0): error doing QXL_ALLOC
Status in xserver-xorg-video-qxl package in Ubuntu:
Confirmed
Bug description:
Have Lubuntu 22.04 installed in a virtual machine created with virt-
manager. The X server will randomly crash with only Firefox and
Thunderbird running, with one or the other minimized.
Old bug reports found online suggested increasing the "vram" setting
to 256 MiB (262144 in the XML file) fixed this problem, however at
that setting, it crashed and this latest crash is when the "vram" was
set to 512 MiB (524288 in the XML file).
Below is the text from the Xorg.0.log.old file from the point of the
crash. The crash of the X server terminated this particular log.
[ 54.773] (II) event4 - spice vdagent tablet: device is a pointer
[ 3431.844] (EE) qxl(0): error doing QXL_ALLOC
[ 3431.844] (EE)
[ 3431.844] (EE) Backtrace:
[ 3431.861] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x139) [0x56450cb3f2b9]
[ 3431.863] (EE) 1: /lib/x86_64-linux-gnu/libc.so.6 (__sigaction+0x50)
[0x7fdab48da520]
[ 3431.864] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 3431.864] (EE) 2: /usr/lib/xorg/modules/drivers/qxl_drv.so (?+0x0)
[0x7fdab413fb2d]
[ 3431.865] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 3431.865] (EE) 3: /usr/lib/xorg/modules/drivers/qxl_drv.so (?+0x0)
[0x7fdab413ffc7]
[ 3431.866] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 3431.867] (EE) 4: /usr/lib/xorg/modules/drivers/qxl_drv.so (?+0x0)
[0x7fdab414c7c0]
[ 3431.869] (EE) 5: /usr/lib/xorg/Xorg (miCopyRegion+0x9b) [0x56450cb1c59b]
[ 3431.870] (EE) 6: /usr/lib/xorg/Xorg (miDoCopy+0x456) [0x56450cb1ccf6]
[ 3431.872] (EE) unw_get_proc_name failed: no unwind info found [-10]
[ 3431.872] (EE) 7: /usr/lib/xorg/modules/drivers/qxl_drv.so (?+0x0)
[0x7fdab414ca02]
[ 3431.873] (EE) 8: /usr/lib/xorg/Xorg (DamageRegionAppend+0x3886)
[0x56450caafa86]
[ 3431.873] (EE) 9: /usr/lib/xorg/Xorg (SendGraphicsExpose+0x2cd)
[0x56450c9c4efd]
[ 3431.874] (EE) 10: /usr/lib/xorg/Xorg (SendErrorToClient+0x365)
[0x56450c9c94a5]
[ 3431.874] (EE) 11: /usr/lib/xorg/Xorg (InitFonts+0x3c4) [0x56450c9cd524]
[ 3431.876] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6
(__libc_init_first+0x90) [0x7fdab48c1d90]
[ 3431.878] (EE) 13: /lib/x86_64-linux-gnu/libc.so.6
(__libc_start_main+0x80) [0x7fdab48c1e40]
[ 3431.878] (EE) 14: /usr/lib/xorg/Xorg (_start+0x25) [0x56450c9b65f5]
[ 3431.878] (EE)
[ 3431.878] (EE) Segmentation fault at address 0x0
[ 3431.878] (EE)
Fatal server error:
[ 3431.879] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 3431.879] (EE)
[ 3431.879] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 3431.879] (EE) Please also check the log file at "/var/log/Xorg.0.log" for
additional information.
[ 3431.879] (EE)
[ 3431.880] (EE) Server terminated with error (1). Closing log file.
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