If video is lagging in the browser too then this is either a general graphics performance issue or you have multiple issues.
That said, you do seem to be using your Intel GPU more than the Nvidia one according to the above logs, so please try this for smoother video playback: 1. sudo apt install ubuntu-restricted-addons vainfo mpv 2. Try playing video in 'totem' or 'mpv' If that doesn't solve then problem then please run 'vainfo' and send us the output. ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1777384 Title: video lags To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1777384/+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