Public bug reported:

System was working with linux-firmware-2.27.
Setup: 2 screens display port 144hz, one tv 60hz on hdmi.

On 2.29, only hdmi displays half of screen (left side, on right side there are 
vertical lines), 60hz only.
After a time, the screen become grey and I have to reboot.
(I have another linux on this computer multi boot which is working without 
issues)

Also, if screens are plug to display ports, they can't get to login
screen.

I use refind to multi boot (I've set resolution max, and also commented
it, but it didn't change)

** Affects: linux-firmware (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2163382

Title:
  display issues with RX 6900XT (display port not working, hdmi only
  half screen)

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