Comment 3 for bug 398026

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To make the analysis easier, could you remove the file .config/monitors.xml in your home directory? This is the file where custom mode setting for your user is stored. I don't see anything wrong with it, but it makes it easier to not have to take that file into account. Then I would like the Xorg.0.log produced when you log in next time without monitors.xml.

You mention that this happens with the latest version of xserver-xorg-video-intel (2:2.7.99.901+git20090702.74227141-0ubuntu1). Does that mean that it doesn't happen with the previous version?

Did you also upgrade the linux kernel recently? You have 2.6.31-2-generic and I seem to remember that the default was 2.6.31-1-generic until recently. Could you try to downgrade that as well to see if it changes anything (if you have an installed system, you probably have the old versions available in your boot menu)? The reason I'm asking is that the actual mode setting is now handled in the kernel (c.f. https://lists.ubuntu.com/archives/ubuntu-x/2009-June/000578.html) and if this problem was just introduced, it could have been through a kernel update.

A piece of information which may be useful to the developers is whether this also happens without kernel mode setting. To disable kernel mode setting add the boot parameter i915.modeset=0 to the kernel boot options. An Xorg.0.log and `xrandr --verbose` output from this case might be useful as well.