backport the patches from https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/460 doesn't help.
--- * d5016e5b61f96496f9b31d14eae16f5f0148b748 (HEAD -> backport-7-patches-from-Łukasz-sync_present_to_slave_outputs) Remove unused function ms_covering_xf86_crtc() * d892481c2a3d67462f6d2c0d762c43b63cdcd45c xserver/output: rename some badly named variables/APIs. * 1fb0dc09a60e97306088d75fefeed17a39e622ea (master) modesetting: Remove few common functions from ms namespace * a1f28e05d602f5cde825111ca0654311c2aba73b modesetting: remove unnecessary ms_covering_xf86_crtc dup of ms_covering_randr_crtc * d1b3204d1f1357426864c5125bf2ff8b84827d23 modesetting: Find crtc on secondary outputs as fallback instead of returning primary crtc * 028688ba6dc50fbc6430812c608f69912e4196d4 randr: Fix link errors after previous commit * 327441e28fa50fef18c0d15f377e61479fa956a4 present: fix msc offset calculation in screen mode * 8477111ac5e3dee4066efc689d4507fa1b245900 present: Use crtc's screen present operation for syncing * c271560a66d1d0a36dd7b784e75822ee00acc216 modesetting: Initialize present extension despite glamor is disabled * 9f5b6b400462dd5b979c40361c4fcb35d08f9dd1 apt source xserver-xorg-core -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1923153 Title: Display output laggy from iGPU when operating on desktop with attaching AMD R7 430 graphic (dGPU) To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1923153/+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
