Please try adding kernel parameter:
i915.enable_psr=0
which you can do in /etc/default/grub as part of the
GRUB_CMDLINE_LINUX_DEFAULT line. Then run:
sudo update-grub
and reboot.
** Changed in: linux-hwe-5.11 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1964916
Title:
[HP Omni 120-2110il AIO] Flickering white lines on screen
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