Ubuntu
xserver-xorg-video-intel package

  1. Bug #283723
  2. Comment #7

Comment 7 for bug 283723

Revision history for this message
Geir Ove Myhr (gomyhr) wrote : Re: [Intreprid] GDM screen doesn't show up on external screen on INTEL 965GM

It looks from the log files (both good and bad) as if you have a TV-out connected, which I guess you have not:
(II) intel(0): Output VGA connected
(II) intel(0): Output LVDS connected
(II) intel(0): Output TMDS-1 disconnected
(II) intel(0): Output TV connected
(II) intel(0): Using fuzzy aspect match for initial modes
(II) intel(0): Output VGA using initial mode 1024x768
(II) intel(0): Output LVDS using initial mode 1024x768
(II) intel(0): Output TV using initial mode 1024x768

While this may be unrelated, maybe you can try if disabling the TV output changes anything:
https://wiki.ubuntu.com/X/Quirks#Ignore%20TV%20Output%20Quirk