Comment 17 for bug 547147

I was experimenting a bit with that as I had seen similar messages on one of my machines when connecting the external monitor through a kvm switch. In my case there seems to be some electrical problems to detect the bus line pulled to 0. Maybe other people affected could try to use one of the kernels at: http://people.canonical.com/~smb/i915-edid-test/ and report back here (best with the dmesg output from the new kernel)?