It looks the those messages are coming from the kernel. Although you might not encounter the problem till xserver-xorg-video-amdgpu is enabled.
** Tags added: amdgpu ** Package changed: xorg (Ubuntu) => gnome-shell (Ubuntu) ** Summary changed: - GUI performance is poor + [amdgpu] GUI performance is poor ** Package changed: gnome-shell (Ubuntu) => xserver-xorg-video-amdgpu (Ubuntu) ** Also affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1805821 Title: [amdgpu] GUI performance is poor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1805821/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs