OT - modeline question

[Mark Knecht <mknecht controlnet com>]

Hi,
   A very strange corner case here, and not specifically Redhat 
oriented so forgive my OT nature, so I won't try to explain it in any 
detail.

   Does anyone know how to find out exactly what modeline settings X 
has used in the case where it found no valid modelines in the XF86config 
file and then created it's own settings?

   A specific machine seems to default to good settings on its own, but 
we are unable to put a modeline statement in that makes X do the same thing.

   Is there a command to extract from a running machine what it is 
using for it's current modeline?

   Any pointers are welcomed.

Thanks,
Mark