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-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/758562 Title: [GM45] Xorg freeze _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
