[Nouveau] [Bug 99922] [NVE4] [regression, bisected] 4.10 (atomic): X shows black screen with cursor after monitors turn off

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99922

--- Comment #6 from Ben Skeggs <skeggsb at gmail.com> ---
(In reply to kevin from comment #5)
> Created attachment 129896 [details]
> Normal Xorg logs on Linux 4.10 with xf86-video-modesetting
> 
> Interestingly, the bug does not appear with the generic modesetting driver!
> I've attached the Xorg log, but it seems normal.

Yeah, the nouveau 2D driver doesn't handle page flips failing correctly for
some reason (this can happen under atomic when DPMS is set to a power-saving
mode).

I wasn't able to reproduce this with the nouveau DDX running in its (default)
DRI2 mode, only DRI3, so I hadn't prioritized looking into it.

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