radeon RV516 dual head support

[Alex Deucher]

On Wed, Jun 24, 2009 at 9:53 AM, Andreas Gajda<andreas_gajda at web.de> wrote:
> Hello List Members!
>
> I have some problems getting my radeon X1300 card running with dual head
> enabled. I don't know were to start, so I decided to start at x.org
> list, rather than on the kernel list.
>
> As far I can tell from the X-logfile(attached together with the
> configuration), the radeon driver recognizes the card at the PCI
> interfaces PCI:2:0:0 and PCI:2:0:1.  (I have an unused Nvidea-card on
> board as well). Since Xinerama is enabled an clone mode off, I expected
> to get two different screens. But I get a cloned desktop with the same
> resolution. (this is a little annoying since only one of the monitors is
> a widescreen...)
>
> I recently switched to gentoo, but had this card running as dual-head
> under Ubuntu already. Unfortunedly I didn't save the xorg.conf and
> kernel setup. The current kernel is installed with drm and radeon as
> modules, but lsmod says there not loaded at this point. This is
> something confusing for me, since I thought the radeon xorg server
> module relies on this modules.
>
> Can you provide me please some pointers, what I am missing? Thanks in
> advance!

use xrandr:
http://wiki.debian.org/XStrikeForce/HowToRandR12

Alex