How to check the maximum screen size in RandR 1.2?

[Wu, Nian]

Alberto Milone wrote:
> Hi, I know that the Intel driver cannot reallocate the frame buffer,
> therefore "whatever size you start with is the maximum the screen can
> ever become". My question is how can I get to know this maximum size
> the Xserver starts with?
> 
> For example xrandr (randr 1.2) (with my Intel card) says that the
> screen cannot be larger than 1600x1600 (unless I set the virtual
> resolution). I would like the get the maximum size (on any randr 1.2
> compatible card/driver) so as to decide whether to set the virtual
> resolution through an application I'm working on. Is it possible?

You can use "xrandr -q" to check the maximum size. The output's first
line will give
the maximum size.

You can set the maximum size in "Screen" section of xorg.conf.
The page maybe helpful: http://www.intellinuxgraphics.org/dualhead.html

Nian Wu