(In reply to comment #32)
> Created attachment 70223 [details]
> Partial kernel.log
> 
> Here is a partial kernel.log tracking what is going on at boot with some
> debug printk in evergreen_mc_stop() and evergreen_mc_resume(). Strangely,
> only one crtc is saved as enabled in the _stop function, but four are
> restored in the _resume function. Pretty sure it's not the problem we are
> looking for, but it is abnormal since only one crtc should be restored on
> resume. This is a bug by itself showing a problem in the
> save(stop)/restore(resume) mechanism.

I should have said "... but six are restored..." instead of "... but four are
restored..." I also made a small error in a debug string, but it doesn't change
the read value. If you have any question on my patch, let me know.