Please attach your /var/log/Xorg.0.log from right before one of these reboots.
Also, I'm wondering if it is a kernel issue (Xorg issues generally don't cause system reboots). ** Changed in: linux (Ubuntu) Sourcepackagename: xorg => linux -- ctrl+alt+backspace sometimes reboots instead of restarting X https://bugs.launchpad.net/bugs/204423 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