Comment 17 for bug 727979

Hi, I have the same screen flicker every 30 seconds using an ati 9200se dual card on an install from the Natty liveCD. The flicker coincides with four entries in the syslog which are monitor edid errors (see attached file). VGA-1 which the error refers to is not listed when I use xrandr

Screen 0: minimum 320 x 200, current 2048 x 768, maximum 4096 x 4096
VGA-0 connected 1024x768+1024+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768 60.0*
   800x600 60.3 56.2
   848x480 60.0
   640x480 59.9
DVI-0 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768 60.0*
   800x600 60.3 56.2
   848x480 60.0
   640x480 59.9
S-video disconnected (normal left inverted right x axis y axis)