Sounds like bug 1958191 which for most people is fixed in kernel
5.15.0-40. Please update your system:
sudo apt update
sudo apt full-upgrade
Then reboot and tell us if the problem persists.
** Package changed: xorg-server (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1980586
Title:
screen is flickering in Ubuntu 22.04
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