Re: monitor setting in gnome using new randr 1.5 option

[Dave Airlie <airlied gmail com>]

On 12 November 2015 at 00:50, Stephen Adler <adler stephenadler com> 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.

You need X server 1.18 at least.
You also need nvidia to make changes to their driver to support tile
blobs. I'm not sure if they've done this or not.

xrandr --props on their driver when they release 1.18 compatible
driver will tell you.
Dave.