[Nouveau] [Bug 70875] [NVC1] NOUVEAU(0): [drm] failed to set drm interface version

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70875

--- Comment #10 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #9)
> (In reply to comment #8)
> > I don't see anything that suggests that you have a hardware mux. The VGA/DVI
> > connectors appear to be on the nvidia card -- they're inaccessible from
> > intel, right? (A bit hard to tell from your logs...)
> 
> Hmm, I thought I have one (or maybe I don't understand a problem :) ).
> Currently with bumblebee I have NVidia card off and still can use both
> screen (though VGA or HDMI output).

Oh, if you can get to all your outputs from the intel card, but can also get
them from the nvidia card, then you do have a hardware mux. My bad. But I think
you can still use the xrandr offload stuff in that case, as shown on
http://nouveau.freedesktop.org/wiki/Optimus/. In the end, what are you looking
for from your nvidia card? If it's the occasional 3d game/whatever, you can use
DRI_PRIME=1 for that, at which point it should turn on and then turn back off
when you're done due to runtime pm. [Make sure that your kernel is configured
with CONFIG_RUNTIME_PM.]

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