[Bug 81456] [sna suse] present makes dpms defunct

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81456

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
Ah, I've spotted it.

The next update after the DPMSSuspend does:

[ 46066.999] sna_present_unflip(event=440)
[ 46066.999] get_flip_bo(pixmap=348)
[ 46066.999] sna_pixmap_move_to_gpu(pixmap=348, usage=16), flags=42
[ 46066.999] sna_pixmap_move_to_gpu: already all-damaged
[ 46066.999] sna_pixmap_mark_active: pixmap=348, handle=118
[ 46066.999] page_flip(pipe=-1, event=440, handle=118)
[ 46066.999] sna_page_flip: handle 118 attached
[ 46066.999] do_page_flip: crtc 0 id=5, pipe=0 active? 0
[ 46066.999] do_page_flip: crtc 1 id=8, pipe=1 active? 0
[ 46066.999] do_page_flip: crtc 2 id=11, pipe=2 active? 0
[ 46067.000] sna_page_flip: page flipped 0 crtcs
[ 46067.000] page_flip: pageflip failed
[ 46067.000] sna_present_unflip: failed, trying to restore original mode
[ 46067.000] (II) intel(0): switch to mode 1366x768 at 60.1 on LVDS1 using pipe 0,
position (277, 1080), rotation normal, reflection none

So I confuse the no-op with a failure to flip and proceed to hammer the CRTC
back into shape - that also forces them awake again.

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