Re: Radeon 7500 M config questions

--- Matthew Saltzman <[email protected]> wrote:
> I have a couple of questions regarding my Dell Latitude C640 with the
> above video system.  I looked at XFree86.org, but I couldn't find
> clear
> answers.
> 
> (1) Can the panel display multiple resolutions?  If so, what needs to
> be
> in XF86Config to enable that and what hot keys change the resolution?

Yes.  You just need to add the modes to the screen section of your
XF86Config.  Ctrl-alt-+/- scrolls through the modes.

> 
> (2) When I plug in an external monitor, it displays the same image as
> the
> panel, but even though the panel is 1024x768, the external monitor
> seems
> to be displaying a much lower resolution.  How can I configure the
> external monitor for 1024x768 or to match the panel resolution?

I think by default the first crtc outputs the same mode to both heads. 
if you want to use a different mode on the CRT, use the mirror option
in your config file.  See the radeon man page for more info about
radeon driver options.

> 
> (3) Can I enable switching the external display and panel on and off
> using
> Fn-F8?

Not sure.  that is BIOS dependant as far as I know.

> 
> (4) Can the external monitor be used in multi-head mode?  (I gather
> the
> answer to this question has been no.)

Yes.  you will have to specifiy a separate "device" and "screen"
section for each head and then in the "device" sections use "screen 0"
for the first head and "screen 1" for the second.  See the XF86Config
man page for more info on setting this up.




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