See: http://www.linuxforums.org/forum/linux-laptops/58492-dell-c610 -display-close-crashes-x-org.html
It claims: "The problem appears to be solved. Disabling the console framebuffer fixed it." -- Xorg exits when it receives an ACPI button/lid event https://launchpad.net/bugs/61746 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
