Adam Nielsen a.nielsen at
Sun Sep 13 04:10:22 PDT 2009

> I have 3 monitors (two side monitors being rotated 90 degrees), two
> Nvidia GPUs... and so far the only way to get them functioning is
> through xinerama. I'd like to get away from xinerama as it doesn't seem
> to allow for 3D...

It depends on what you need to do, but if you don't worry about Xinerama and
just set the monitors up as separate X11 screens then you can have 3D
acceleration across them all.

The only downside with this is that you can't drag windows between screens
(which is what Xinerama was created to solve.)

The nVidia driver can combine multiple monitors into a single X11 screen
though, so you could use that to get 3D acceleration across screens, but I
suspect this is on a per-GPU basis.  Still, with two GPUs you could have two
3D accelerated X11 screens, with one screen being split across two monitors...

> Is it possible to use xrandr in this configuration? If it is, can some
> one point me in that direction? I've been all over google, and really...
> am just more confused.

I'm probably wrong, but I always thought xrandr was for adjusting screen
resolution and settings, I didn't think it had anything to do with combining
multiple screens into a single display.  Perhaps it has advanced since I first
used it...


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