Hi Daniel, I could reproduce this issue when using today hirsute daily build
$ sha256sum ~/Downloads/hirsute-desktop-amd64.iso 4908a5c919f4b796a856be69a044334eb1a910727180618348db0a8a1ef70360 /home/jeremysu/Downloads/hirsute-desktop-amd64.iso after switching back to xorg (hirsute default uses Wayland) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1923153 Title: [radeon] 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