Public bug reported:
I found this report on Ubuntu MATE forums, It describes the issue very well:
https://ubuntu-mate.community/t/20-04-display-issues-with-amd-rx560/21648
Some additional feedback:
- Same issue affects Xubuntu 20.04 and Ubuntu Studio 20.04. Workaround for XFCE
is mentioned in the link above.
- Same issue affects my PC that has a different AMD GPU. Radeon VII in my case.
Tested with Ubuntu Mate 20.04 and Ubuntu Studio 20.04 (XFCE).
- Ubuntu MATE 20.04 marco works well on my Intel GPU and Intel+Nvidia Optimus
computers.
I have found a temporary workaround as mentioned in the linked forum
post:
1. Boot live ISO, select safe graphics. Complete installation and shut down.
2. On first boot, Hit "Esc" key to show GRUB menu, then "e" to edit, insert
nomodeset at the end of the line that starts with "linux /boot/vmlinuz...".
Press F10 to boot.
3. Login and open "MATE Tweak".
4. Select the third item from left panel: "Windows".
5. In the Window Manager , switch to "Marco (No compositor)".
6. Reboot (nomodeset will not be persistent so next boot is normal graphics
mode).
7. Enjoy.
I am available if further details or troubleshooting steps are needed.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: marco 1.24.0-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Sat May 2 23:58:45 2020
InstallationDate: Installed on 2020-05-02 (0 days ago)
InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64
(20200423)
SourcePackage: marco
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: marco (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1876480
Title:
Ubuntu MATE 20.04 Display issues with AMDGPU
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