On Tue, 2008-06-10 at 12:01 +0100, Colin Guthrie wrote:

> Chances are your monitor is not giving the EDID info correctly - tho' if
> you have tried several displays this is unlikely. I have a similar chip
> myself and it works fine :/
>
> Perhaps your xorg.conf does something odd with disabling EDID or something?

I saw someone reporting a similar issue on the forums recently. I got
their xorg.conf and Xorg.0.log and could not see what the problem was;
no unusual settings in xorg.conf , and from the log, the monitor was
providing correct modelines via DDC. I *think* it's some kind of driver
bug.
--
adamw