Comment 18 for bug 198849

intel driver appears to know that the DVI cable is connected and disconnected...

xrandr outputs with disconnected and connected

 xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1680
VGA connected 1680x1050+0+0 (normal left inverted right x axis y axis) 450mm x 280mm
   1680x1050 60.0*+ 60.0
   1280x1024 75.0 59.9
   1440x900 75.0 59.9
   1152x864 75.0 74.8 69.8 60.0
   1024x768 75.1 70.1 60.0
   832x624 74.6
   800x600 72.2 75.0 60.3 56.2
   640x480 75.0 72.8 66.7 60.0
   720x400 70.1
TMDS-1 disconnected 1680x1050+0+0 (normal left inverted right x axis y axis) 450mm x 280mm
[kdekorte@quad ~]$ xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1680
VGA connected 1680x1050+0+0 (normal left inverted right x axis y axis) 450mm x 280mm
   1680x1050 60.0*+ 60.0
   1280x1024 75.0 59.9
   1440x900 75.0 59.9
   1152x864 75.0 74.8 69.8 60.0
   1024x768 75.1 70.1 60.0
   832x624 74.6
   800x600 72.2 75.0 60.3 56.2
   640x480 75.0 72.8 66.7 60.0
   720x400 70.1
TMDS-1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 450mm x 280mm
   1680x1050 60.0*+ 60.0
   1280x1024 75.0 59.9
   1024x768 75.1 70.1 60.0 59.9
   832x624 74.6
   800x600 72.2 75.0 60.3 56.2
   640x480 75.0 72.8 66.7 60.0
   720x400 70.1