Re: monitor setting in gnome using new randr 1.5 option

[drago01 <drago01 gmail com>]

On Wed, Nov 11, 2015 at 8:22 PM, Stephen Adler <adler stephenadler com> wrote:
> 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.
> :)

Yes thats how it is supposed to work afaik (no hardware here to verify).