Bug#531868: xserver-xorg-video-radeon: Secondary display not recognized as connected with All in Wonder 9600

[Alex Deucher]

On Thu, Jun 4, 2009 at 8:10 PM, Ian Lewis <ianmlewis at gmail.com> wrote:
> AFAICT switching the monitors does not help. If you switch them then the
> output is simply switched. VGA-0 is always blank.
>

For some reason DDC doesn't seem to be working on that port.  You
might try xf86-video-ati from git or the 6.12-branch depending on what
version you are currently using.  If that doesn't work, you can force
the monitor on manually with xrandr:
http://wiki.debian.org/XStrikeForce/HowToRandR12

Alex