For what it is worth, I have 15.10 installed on a Thinkpad X1 with an Ivy Bridge processor (i5-3427U) and Intel HD 4000 graphics and I am seeing very similar behavior. Full screen video from Chrome or games on Steam cause the freeze.
The freeze is usually when switching away from the video/game or when using the volume keys which causes the onscreen popup to occur. This is new in 15.10. It didn't have this problem when I first upgraded to 15.10 (from 14.04) but seems like it started a couple weeks ago. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1516531 Title: Fullscreen Freeze. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1516531/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
