Thanks for the bug report.

The biggest issue here seems to be a kernel crash:

Jan 16 19:40:28 semiauto kernel: [84513.834489] adding CRTC not allowed without 
modesets: requested 0x4, affected 0x7
Jan 16 19:40:28 semiauto kernel: [84513.834564] WARNING: CPU: 4 PID: 2041 at 
drivers/gpu/drm/drm_atomic.c:1403 drm_atomic_check_only+0x40c/0x450 [drm]

But it sounds like the kernel is complaining that gnome-shell is to
blame. To work around that, please try adding:

  MUTTER_DEBUG_FORCE_KMS_MODE=simple

to /etc/environment and then reboot.

But there are three different crashes here and we need separate bugs
opened for each. The other two crashes are of 'gjs-console' and I can
see 'gnome-shell' also crashed according to the log. Please open new
bugs about each of those by following
https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment

** Summary changed:

- gjs crash crashes gnome session
+ gnome-shell crashes in the kernel at drm_atomic_check_only and the kernel 
says "adding CRTC not allowed without modesets: requested 0x4, affected 0x7"

** Package changed: xorg (Ubuntu) => mutter (Ubuntu)

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Bug watch added: gitlab.freedesktop.org/drm/intel/-/issues #6728
   https://gitlab.freedesktop.org/drm/intel/-/issues/6728

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/2003031

Title:
  gnome-shell crashes in the kernel at drm_atomic_check_only and the
  kernel says "adding CRTC not allowed without modesets: requested 0x4,
  affected 0x7"

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