I have a very simple solution that solved it for me. I have an Acer Nitro with NVIDIA GeForce GTX 1650. After installing Ubuntu 22.04, every time I attached an external monitor the Xorg CPU usage was 25% - 33% even when nothing is running. This happens with driver 470 and 510.
To fix it - run the NVidia X-server settings app. Under Prime Profiles, select NVIDIA (Performance Mode). Reboot. Now Xorg CPU usage is 0.3%. -- 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/1944667 Title: High CPU usage in Xorg with NVIDIA reverse prime external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-470/+bug/1944667/+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
