https://bugs.freedesktop.org/show_bug.cgi?id=33011
--- Comment #4 from Alex Deucher agd5f@yahoo.com 2011-01-20 16:22:23 PST --- Does the LVDS come on when you resume? X may be getting confused and enabling the wrong displays on resume (LVDS+VGA rather than VGA+HDMI) since all are attached. Can you manually reconfigure things using xrandr after resume?