Shaun, bug 147846 may be the same issue as you have.
Could you try to downgrade package xserver-xorg-core to the previous version
(probably ubuntu6) and test again?
** Changed in: xorg (Ubuntu)
Status: New => Incomplete
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Incomplete
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Xorg 1:7.2-5ubuntu10, blank screen on Intel 830 laptop
https://bugs.launchpad.net/bugs/147189
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