https://bugs.freedesktop.org/show_bug.cgi?id=44422
--- Comment #1 from Alex Deucher agd5f@yahoo.com 2012-01-03 06:21:29 PST --- Please attach your xorg log, dmesg output, and glxinfo output. If it happens every 30 seconds, it may be your desktop environment polling the connectors on your video card to see what is connected. They shouldn't be doing that as the driver handles that internally and generates hotplug events automatically.