X-server won't start with K7VM3 system

[Andrew Giles-Peters]

I installed fedora core 3 on a PC with an asrock motherboard K7VM3/E/M/ESYS.
This has a VIA KM266Pro chipset.  Anaconda recognised the video controller as an S3 but X-Windows failed to launch - error being a negative/unknown video mode.  It did not recognise my monitor. (An Ipex 17").

Any suggestions?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.fedoraproject.org/pipermail/users/attachments/20050520/9e6e9bad/attachment-0002.html