If you're sure changes are required in "nouveau and amdgpu xserver DDX drivers" then those are different packages that should be added as new tasks at the top of the page:
xserver-xorg-video-nouveau xserver-xorg-video-amdgpu ** Changed in: xorg-server (Ubuntu Impish) Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875015 Title: Ubuntu 20.04 and Displaylink is extremely slow To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1875015/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs