[Bisected] GPU hangs and display artifacts on 5.18-rc3 on Intel GM45

Platform: Dell Latitude E6500

Chipset: Intel GM45

Steps to reproduce: happens soon after boot on kernel 5.18-rc3 . Can be triggered fast by opening a terminal and executing "dmesg" for a few times. Sometimes happens only after several minutes of GUI activity, though.

System architecture: amd64

Linux distribution: Ubuntu 20.04 fully updated

Xorg, Gnome Flashback

Display connector: LVDS

Bisected down to

commit b5cfe6f7a6e1 ("drm/i915: Remove short-term pins from execbuf, v6.")

Reverting this commit on top of v5.18-rc3 fixes the issue.

Photos of artifacts on the screen:

Dmesg after occurrence of this problem, on hand-compiled 5.18-rc3: dmesg_5.18.0-rc3.txt

Dmesg on 5.18-rc3 with this commit reverted: dmesg_5.18-rc3_reverted_patch.txt

System information: xrandr__verbose.txt lspci_vvvnn.txt (obtained from some previous kernel).