My experience (Dell Optima 280GX with integrated Intel graphics) might point to the same problem:
Since yesterday's (June 3) update, at screen idle (I've disabled it now in Power Manager), and running a game, video or youtube full screen, I get kicked out to the log-in screen. -- xorg segvaulting https://bugs.launchpad.net/bugs/383468 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs