This really sounds like Bug #127101 . Maybe Mac hardware just reboots after freeze. Could you recheck if the screen looks similar like in this video http://launchpadlibrarian.net/8783569/SSA43053.AVI after crash ? If yes please mark this bug as a duplicate or at least report it here.
-- Spontaneous reboots on suspend-to-RAM with new Xorg "intel" driver https://bugs.launchpad.net/bugs/128653 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs