Created attachment 93418
dmesg|grep drm output for drm.debug=0xe on 2014-02-04
Here is a drm.debug log with the 3.13.0-6-generic kernel in Ubuntu Trusty. It includes all the drm output from the boot command up to the second display failure when lightdm comes up, another failure for the display to come up after logging in, and it being fixed with the xrandr command (which I've set up to be run automatically 10 seconds after log in).
Created attachment 93418
dmesg|grep drm output for drm.debug=0xe on 2014-02-04
Here is a drm.debug log with the 3.13.0-6-generic kernel in Ubuntu Trusty. It includes all the drm output from the boot command up to the second display failure when lightdm comes up, another failure for the display to come up after logging in, and it being fixed with the xrandr command (which I've set up to be run automatically 10 seconds after log in).