So this are the results using the latest Mutter (3.26.1) from todays update plus Nvidia 387.22 with an Nvidia GTX 1080 - https://imgur.com/a/3stwv
With Dying Light both border issues showed. With Mad Max one showed and after doing a 2nd ALT-TAB both showed. With Shadow of Mordor both showed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725649 Title: Fullscreen games lose "fullscreen" after an Alt+Tab To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1725649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs