https://bugs.freedesktop.org/show_bug.cgi?id=67878

--- Comment #32 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
One idea I just randomly had was that there might be a difference in the
teardown process. For example, in the removed code, nv50_display_fini did
stuff. In the current code, it's basically empty (well, some small bits in
nouveau_display_fini).

It looks like the old code

(a) blanked each crtc
(b) sent out a EVO_UPDATE command
(c) waited for each crtc to hit a vblank
(d) did something with the cursor (cleared it?)
(e) waited for some sort of DPMS thing

It could well be that this now happens elsewhere, but I just wanted to put that
thought down on "paper".

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