On Sun, 13 Oct 2002, martin f krafft wrote:

> i have a setup documented by the attached XF86Config-4 file

This wasn't attached when I received your mail.

> as it runs
> on my Latitude C610 with a Radeon Mobility LY. it's dual head and
> works perfectly as such. i start it through xdm.
> 
> nevertheless, it makes a difference to X whether an external VGA
> monitor (analog flatscreen) attached or detached.
> 
> If it's detached, then X comes up just fine, displaying the second
> screen on the external monitor as soon as I plug it in (after it
> started).
> 
> If the VGA cable is attached at the time of loading X, then my laptop
> flatscreen goes all funky (black and white, melting around the screen,
> constantly changing and giving me a general feel that it's not good
> for the display) and the external monitor stays blank.

XFree86 uses DDC to detect a VGA monitor; for a laptop this usually means
an external monitor, and X can behave differently, depending on the 
details returned by the monitor, so it isn't a big suprise that it
behaves differently if the monitor is plugged in at start up.

The Radeon DDC support, especially for laptops, has been changed in the
last week, so I suggest you try a very recent CVS build and see if that 
helps.

-- 
Dr. Andrew C. Aitchison         Computer Officer, DPMMS, Cambridge
[EMAIL PROTECTED]   http://www.dpmms.cam.ac.uk/~werdna

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