*** This bug is a duplicate of bug 2062951 ***
    https://bugs.launchpad.net/bugs/2062951

I can confirm that editing grub:

sudo nano /etc/default/grub


And changing: 

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0"


And then rebooting, solved the problem in a Dell Optiplex 5080 SFF (Intel 
Corporation CometLake-S GT2 [UHD Graphics 630] (rev 03)

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https://bugs.launchpad.net/bugs/2064189

Title:
  Screen flickers after installing Ubuntu 24.04

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