Reopening, problem is back 1 day after official Lucid release. Forcing
modprobe option i915 modeset=1, or booting with "nomodeset" make no
difference.

Apparently EDID is detected properly and XRandR believes the display to
be enabled, yet the monitor remains in power save.  Switching from DP1
to DVI1 works, as well as dual-booting into Windows 7.

** Changed in: xserver-xorg-video-intel (Ubuntu Lucid)
       Status: Invalid => New

-- 
[GM45] [upgrade] [regression] [lucid]: external monitor only usable via DVI, 
not via DP
https://bugs.launchpad.net/bugs/557436
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