Ubuntu 16.04 (xenial) reached end-of-standard-support on April 29, 2021. Reporter says in comment #5 that issue has been fixed. Sorry Mike, for not acknowledging your comment until now. I'm closing this now as being fixed as there have been no further comments for over five years now.
** Changed in: xorg (Ubuntu) Status: Confirmed => Fix Released -- 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/1646665 Title: System becomes unstable on resume To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1646665/+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