Bug#437332: xserver-xorg-video-ati: Failed to detect secondary monitor, MergedFB/Clone mode disabled

[Alex Deucher]

On 8/11/07, Alberto Mardegan <mardy.tardi at gmail.com> wrote:
> Package: xserver-xorg-video-ati
> Version: 1:6.6.193-1
> Severity: normal
>
> My Samsung television, which is connected to my laptop through a VGA
> cable, doesn't show any output.
> I'm trying the latest version of the driver from debian experimental; it
> is better than the previous, in the sense that at least it detects that
> the secondary monitor is connected through a VGA port, but then it
> doesn't detect the monitor (the TV) itself.
>

you monitor is not being detected and doesn't provide an edid.  you'll
need to force both monitors monitors on using:
Option  "MonitorLayout"                 "LCD, CRT"
and you'll have to specify the h and v sync ranges for the second
monitor using the crt2hsync and crt2vrefresh options.  See the radeon
man page for more info.

Alex