This bug began affecting me on April 16, 2017. I'm using Chrome 57 and when I move one window to my bottom 2x2 vertical desktop, the UI is extremely laggy. Moving it back to desktop 1 resolves the issue immediately.
$ uname -a Linux eldritch 4.8.0-46-generic #49~16.04.1-Ubuntu SMP Fri Mar 31 14:51:03 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Does not seem to affect Firefox. -- 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/1628866 Title: After upgrading to 16.10, Chrome has become unusable because of extremely slow update To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1628866/+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