Thanks for the bug report.
Please try adding i915.enable_psr=0 to your kernel parameters
(GRUB_CMDLINE_LINUX_DEFAULT) in /etc/default/grub and then run:
sudo update-grub
and reboot.
Please tell us if that has fixed the problem, but regardless please also
then run:
journalctl -b0 > journal.txt
and attach the resulting text file here.
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
** Package changed: gnome-shell (Ubuntu) => linux (Ubuntu)
** Summary changed:
- random flashing, blinking screen
+ [i915] random flashing, blinking screen
** Tags added: i915
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https://bugs.launchpad.net/bugs/1970869
Title:
[i915] random flashing, blinking screen
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