After updating nvidia to 525.78.01 the lag reappears, the external monitor is extremly slow again. I've tries purging nvidia* and xserver- xorg-video-amdgpu but no luck.
-- 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/1875015 Title: Displaylink is extremely slow in Xorg sessions Status in Nouveau Xorg driver: New Status in OEM Priority Project: New Status in xf86-video-amd: Fix Released Status in X.Org X server: Fix Released Status in xorg-server package in Ubuntu: Fix Released Status in xserver-xorg-video-amdgpu package in Ubuntu: Fix Released Status in xserver-xorg-video-nouveau package in Ubuntu: In Progress Status in xorg-server source package in Focal: Fix Released Status in xorg-server source package in Hirsute: Won't Fix Status in xorg-server source package in Impish: Fix Released Status in xorg-server source package in Jammy: Fix Released Status in xserver-xorg-video-amdgpu source package in Jammy: New Status in xserver-xorg-video-nouveau source package in Jammy: New Bug description: Using ubuntu 20.04 on displaylink docking with external monitor is totally slow, unusable. The GUI responds very slow, if you click, the command of the click goes on after about 3 seconds... if you type, all the letters are with the same lag, so it is totally unusable. Was using displaylink without any problem on 19.10 until yesterday, when I upgraded to 20.04. It is terrific. If i plug out the usb for the displaylink docking station, than the speed is back, and the system is ok, if I connect it to the docking station again, everything extremely slow again. Please investigate this asap, as it is unusable on displaylink docking stations. To manage notifications about this bug go to: https://bugs.launchpad.net/nouveau/+bug/1875015/+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