It does look like the backlight is spontaneously changing. Can you please attach the output from 'echo 0xa > /sys/modules/drm/parameters/debug ; sleep 30; dmesg' ?
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1152597 Title: Screen Flickers on 64-bit Ubuntu 12.10 - Intel GM45 Chipset Status in “xserver-xorg-video-intel” package in Ubuntu: New Bug description: Experiencing periodic screen flickering / blacking out See video 1 - http://youtu.be/C6BzM_YSZb0 (Occasional Flickering) See video 2- http://youtu.be/ONvxnAZz5Rc (Constant Flickering) This happens sometimes every 30 seconds or so, sometimes every 3-5 seconds making work impossible. Happens primarily when working with drawing, browsing etc, no discernible pattern. Problem has existed for at least a couple of months, sometimes more pervasive than others. Using 64 bit Ubuntu 12.10 with Lenovo X200, Intel GM45 Chipset. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1152597/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
