Hi Daniel, Thanks for sharing comment#27.
Let me summarize the reproduce scenarios in Intel + AMD case. 1. Boot from iGPU -> switch to dGPU -> switch back to iGPU -> iGPU lag. 2. Boot from iGPU -> connect secondary monitor to dGPU -> remove 1st monitor from iGPU -> dGPU lag. 3. Boot from iGPU -> connect secondary monitor to dGPU -> set iGPU as primary display -> moving an application (e.g. glxgear) from secondary display (dGPU) to primary display (iGPU) -> iGPU lag. The comment#27 could workaround case#1 and case #3. but switch to wayland could fix these three cases. -- 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
