I've looked into it some more (see issue #550091 in the chrome bug tracker), it seems to be much more likely to happen with a 60fps video than anything else. I'll have to try xenial again with this knowledge.
Link to chrome issue: https://code.google.com/p/chromium/issues/detail?id=550091#makechanges ** Bug watch added: code.google.com/p/chromium/issues #550091 http://code.google.com/p/chromium/issues/detail?id=550091 -- 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/1528321 Title: Everything hangs when coming out of fullscreen in chrome To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1528321/+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