Re: monitor setting in gnome using new randr 1.5 option

[Stephen Adler <adler stephenadler com>]

Thanks,

On 11/11/2015 10:34 AM, Bastien Nocera wrote:
> Hey,
>
> On Wed, 2015-11-11 at 09:50 -0500, Stephen Adler wrote:
> > Guys,
> >
> > I have 3 MST type 4K monitor hooked up to my PC and I've been trying
> > to
> > get linux to work properly and have been chopping at the bit for
> > randr
> > 1.5 to come out which is supposed to solve the MST tile issue which
> > 4K
> > monitors suffer from.
> >
> > Is there something I have to do, configure some file in /etc/
> > somewhere
> > which would define which tiles make up a monitor? I'm not sure if
> > there
> > is something I have to do, or if gnome is supposed to take care of
> > the
> > tiling for me, by somehow defining which tiles are part of which
> > monitor.
> >
> > to make matters worse, I have a pair of nvidia cards for which the
> > nvidia driver does not support xorg 1.18, so I had to downgrade to
> > xorg
> > 1.17. In doing so, I still have randr 1.5 installed but I don't know
> > if
> > randr 1.5 needs xorg 1.18 or if the two are decoupled enough so that
> > I
> > can run xorg 1.17 with the nvidia driver and get the benefits of the
> > monitor features of randr 1.5.
> >
> > Anyone know the answer to all this? I owe you big if you do.
> A question better asked on X.org mailing-lists, but if you need to use
> the NVidia drivers, it'd be best to wait until they release new drivers
> to avoid mix'n'matching. You can double-check the version of XRandR
> supported by the server with "xrandr --version".
>
> With XRandR 1.5, and GNOME 3.18, MST monitors should just work. If they
> don't, file a bug against mutter, which handles programming the video
> outputs.
>
> Cheers

When you say, it should "just work", do you mean that the tiling problem 
I'm having now will disapear since gnome desktop will figure out that I 
only have 3 monitors and not 6 tiles. Currently, when I go to configure 
the displays, it tells me I have 6 displays to work with (two per 
physical monitor). If all is right, then the gnome display configuration 
tool will only show me 3 monitors to configure? I hope this is what your 
telling me. :)

Thanks for the quick reply!

Cheers. Steve.