Fire GL 9000 with Cinema Display

[Benjamin Herrenschmidt]

On Thu, 2004-12-23 at 09:10 +0100, Beat Fluri wrote:
> > I've had lots of reports of this display not working properly with the
> > modeline obtained from the EDID block, with either X or radeonfb.
> > 
> > A user managed to get the 23" working with that modeline:
> > 
> > # 1920x1200 @ 60Hz
> > Modeline "1920x1200" 193.156 1920 2048 2256 2592 1200 1201 1203 1242 
> > +hsync +vsync
> > 
> > I don't know about the 20".
> 
> I have found some Modelines for 20". How can I force that X use a 
> spezific Modeline. The log tells me that X always uses the Modeline from 
> EDID. I use "DDCMode" "off" but that does not have any impact. I also 
> use UseModes "..." in the Monitor section with a corresponding Modes 
> section, but X does not seem to consult these Modes...

Well, as I wrote later, the current driver is no good at using the DVI
output along with the internal LCD on mobility chips. This will be fixed
sooner or later, but in the meantime, you'll probably need to force it
not to use the LVDS at all...

Ben.