Re: xrandr not working in Dual Monitor

On Sat, 25 Jun 2005, Karthik Ramamoorthy wrote:

> Hi,
> 
>       xrandr is not working in my Dual Mnitor setup. In my
> /etc/X11XF86Config file. it i disable Xinerama then xrandr is working
> properly. But my Dual Configuration is not working properly. And if i
> enable Xinerama then xrandr is not working giving error as follow
> 
> Xlib:  extension "RANDR" missing on display ":0.0"
> 
>    Can anybody tell me why this is happening.

It isn't very clear how the two extensions should work together
and the combination isn't implemented (there may be exceptions
for some cards - I don't know).

I suppose there are two underlying problems for RANDR:
1 X says that the clients can assume that the
screen resolution and depth will not change; and
2 XINERAMA aims to hide the fact that there are multiple heads
from the clients.

[ You will probably get better RANDR support from the Xorg people
 - its designers moved there soon after adding it to XFree86. ]