Comment 97 for bug 681054

The debugging information Chris Wilson is after can be gathered by adding ‘drm.debug=0xe’ to your kernel command line - you can do that the same way that you added “video=VGA-1:d”. Once you've booted, and the screen has flickered a bit, please grab dmesg and attach it here.

You should also be able to add “drm_kms_helper.poll=0” to your kernel command line in /etc/default/grub if you want that work around to be permanently enabled.