ATI Drivers report bogus dot_clock to xvidtune

[Alex Deucher]

On 28 Mar 2006 18:24:29 -0500, Greg Stark <gsstark at mit.edu> wrote:
>
> "Alex Deucher" <alexdeucher at gmail.com> writes:
>
> > see one of the xinerama/dualhead howtos:
> > http://gentoo-wiki.com/HOWTO_Dual_Monitors
>
> Never saw this before (not using gentoo it never occurred to me to check there
> for X documentation). I never noticed the Screen entry before in xorg.conf(5)
> thanks, that's what I was missing.
>
> But I tried something like you suggested and after a few iterations* I got X
> to start up correctly but there's no signal on the VGA output. I can move the
> mouse off the edge of the LCD panel and it disappears off into the area where
> the CRT should be, so X seems to think it set everything up correctly. But the
> CRT displays its "No Signal" box.
>
>

what version of Xorg are you using?  can you post your log?  There
were quite a few problems with the radeon driver in 6.9/7.0 that have
been fixed in cvs.

>
>
> [*] I can't figure out what controls which output is "Screen 0". It seems the
> LCD panel is whichever screen is listed first in the ServerLayout whether
> that's Screen 0 or Screen 1.

Screen 0 is the first crtc (lvds or internal tmds, or DAC). Screen 1
is the second crtc (DAC or external tmds).

>
>
>
> --
> greg
>
>