Comment 67 for bug 586325

Looking at the video it's obvious that parts of the framebuffer are getting displayed, but clearly this is something more than just setting a bad display mode - otherwise the system would return to the working resolution after the “Do you want to keep these settings” timeout elapsed. Indeed, from the most recent Xorg log it looks like the timeout *has* elapsed, and the driver has reset the framebuffer size to 1920x1200.

Since the logs, particularly the dmesg, don't contain any errors, it would be very useful if you could reboot, append “drm.debug=0x06” to the kernel command line, and reproduce this. That will make the intel kernel module (which is likely to be the problem here) print a lot of debugging information into dmesg, which should be recorded in /var/log/kern.log. If you could attach your /var/log/Xorg.0.log and /var/log/kern.log after reproducing with drm.debug=0x06, that would be great.