Sounds like a pagefault-of-doom scenario. Considering the vintage of the kernel, this is likely a pagefault-vs-EIO.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/995524 Title: Periodic X lockups on Dell Latitude E6320 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/995524/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs