[Nouveau] Nouveau and multi-monitor setup for Quadro NVS450 (G98)

[Ben Skeggs]

On Sun, Nov 9, 2014 at 11:08 PM, Dr. Boris Neubert <omega at online.de> wrote:
> Hi,
>
> I have a NVidia Quadro NVS450 graphics card with on screen (4800 x 1200
> pixels) over three monitors. I use the proprietary NVidia modules to
> achieve accelerated 2D graphics and display effects.
>
> Since about the beginning of 2014, probably related to changes in the
> X11 or compositing manager, I experience screen lockups lasting from few
> seconds to several minutes. I therefore would like to move to the
> Nouveau driver which has become the default for most Linux distributions
> anyway.
>
> I am not able to create a multi-monitor setup with current Nouveau
> drivers (from Ubuntu 14.04.1). xrandr -q only shows one monitor.
> http://nouveau.freedesktop.org/wiki/MultiMonitorDesktop/ seems to refer
> to Xinerama which is no alternative to me (slow, no display effects).
>
> If I am not mistaken, the NVS450's chipset G98 is not supported
> according to the feature matrix
> http://nouveau.freedesktop.org/wiki/FeatureMatrix although certain other
> sources from the web state otherwise. I did some extensive search on the
> web to see if anybody had managed to create a three-monitor setup with
> accelerated 2D graphics and display effects with no result.
>
> Thus the question: is this possible, and if yes, what do I need to do?
Hey Boris,

>From what I recall (I believe I have this board on my desk somewhere),
this board is actually two separate GPUs, each one driving two
outputs.  Your best bet is to treat it as one would an "Optimus"
configuration[1].

Ben.

[1] http://nouveau.freedesktop.org/wiki/Optimus/

>
> Kind regards
> Boris
>
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