(In reply to boombatower from comment #5)
> I had planned to test reverting those commits, but after reading through the
> thread it seems those commits simply further exposed symptoms of a larger
> issue that I believe was fixed in
> http://lists.freedesktop.org/archives/dri-devel/2016-January/097880.html.
> 
> I am running a 4.4.0 kernel with that patch applied and so far have not seen
> the issues I described. Although, ironically, on my first boot I had the
> stuck login screen as described in the thread.

Different issues.