Please try an older kernel like:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4.89/amd64/
** Tags added: radeon
** Summary changed:
- screen corruption after last update.
+ [radeon] Horizontal lines of screen corruption after last update.
** Package changed: xorg (Ubuntu) => xserver-xorg-video-ati (Ubuntu)
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: xserver-xorg-video-ati (Ubuntu)
** Tags added: regression-update
** Also affects: mesa (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1911369
Title:
[radeon] Horizontal lines of screen corruption after last update.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1911369/+subscriptions
_______________________________________________
Mailing list: https://launchpad.net/~ubuntu-x-swat
Post to : ubuntu-x-swat@lists.launchpad.net
Unsubscribe : https://launchpad.net/~ubuntu-x-swat
More help : https://help.launchpad.net/ListHelp
