I enabled jammy-proposed and upgrade xserver-xorg-video-amdgpu. Made sure Xorg was selected in GDM, then connected an external monitor which routes to AMDGPU instead of Intel. Close the lid to make the external monitor the single display, the refresh rate is smooth so the issue is resolved.
I also boot up an AMD APU laptop to test the package and no regression was found. ** Tags removed: verification-needed verification-needed-jammy ** Tags added: verification-done verification-done-jammy -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1987038 Title: Fix slow refresh rate when AMD GPU screen in reverse prime mode Status in HWE Next: New Status in xserver-xorg-video-amdgpu package in Ubuntu: Fix Released Status in xserver-xorg-video-amdgpu source package in Focal: Confirmed Status in xserver-xorg-video-amdgpu source package in Jammy: Fix Committed Status in xserver-xorg-video-amdgpu source package in Kinetic: Fix Released Bug description: [Impact] When AMD GPU is a GPU screen using reverse prime and its the only display, the fresh rate is very slow. [Fix] Enable present extension for GPU screen so it can be a viable CRTC to be selected. [Test] On a I+A laptop and external displays are routed to AMDGPU, disable internal display like closing lid can observe the issue. With the fix applied, the external display becomes very smooth. [Where problems could occur] I personally don't see why GPU screen can't use present extension, but this is Xorg so there might be some arcane reasons I didn't think of. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1987038/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
