Obviously, this is a confirmed bug. It's caused by kernel module with X started.
** Changed in: xorg (Ubuntu) Importance: Undecided => Medium Status: Unconfirmed => Confirmed ** Also affects: linux-source-2.6.20 (Ubuntu) Importance: Undecided Status: Unconfirmed ** Summary changed: - X crashes on brightness change on Thinkpad T60 + X crashes on brightness change on couple of laptop models ** Tags added: acpi kernel video xorg -- X crashes on brightness change on couple of laptop models https://launchpad.net/bugs/70073 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs