Comment 14 for bug 384660

Robin, there is a patch upstream that you may test. If you are not comfortable with building packages or simply want to save some time I have built two sets of packages for you and put them at http://www.kvante.info/LP384660/ . You will need use the xorg-edgers PPA to use it (https://launchpad.net/~xorg-edgers/+archive/ppa), since there are some dependencies from there. If you don't want to install it to you computer, it should be possible to use a Jaunty LiveCD and the xorg-edgers-live-test script.

You will probably not need the -dbg packages. There are two versions of the packages:
* xserver-xorg-video-intel_2.7.99.901+git20090610.9d3c3b05-0ubuntu0sarvatt~jaunty_i386.deb
This should be the same as the one in the PPA right now. I just included it so that you can test two packages that are built in exactly the same environment so that the applied patch is the only difference.
* xserver-xorg-video-intel_2.7.99.901+git20090610.9d3c3b05-0ubuntu1gomyhr~jaunty_i386.deb
This is the latest package from the PPA, but with the upstream patch from
http://bugs.freedesktop.org/attachment.cgi?id=26664&action=edit included.

If the patch works, the first package should not detect your HDMI monitor, while the second should.