Install xdiagnose, and then run 'sudo xdiagnose'. Turn on graphics debug messages (the first checkbox).
Reboot, and then reproduce the issue changing your screen's backlight setting. Now ssh into the machine while it is frozen, and run the command 'dmesg > ~/dmesg.txt' and 'cp /sys/kernel/debug/dri/0/i915_error_state ~/i915_error_state.txt'. Reboot and then attach both those files to this bug report. ** Summary changed: - Xorg freeze + [GM45] Xorg freeze -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/758562 Title: [GM45] Xorg freeze -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
