Subject: Re: problems with X configuration
To: Steven M. Bellovin <>
From: Matthieu Herrb <>
List: current-users
Date: 01/05/2005 07:52:42
Steven M. Bellovin wrote:
> I'm having trouble trying to configure X on a new Dell 8400 with a flat 
> panel display.  I ran X -configure; it mostly got things right, but 
> doesn't seem able to figure out the 1600x1200 resolution that the 
> adapter, the screen, and -- "the OS shipped with the box" -- can all 
> handle.
> I've put the Xlog at; I think the 
> problem is that 1600x1200 is described as a "future mode".  I assume I 
> need a Modes section; what I don't know is what all the mystical 
> numbers should be.  I mean -- I don't even know what a DotClock or an 
> hdisp are, let alone what values I should supply....

You log file shows that you've a ATI Radeon card that's not yet 
supported by XFree86. You could use X.Org from pkgsrc, which has a more 
recent radeon driver that has support for it.

You cannot setup custom modelines with the 'vesa' driver, and I don't 
have a clue on why it doesn't use the 1600x200 mode that the BIOS 
advertises as 'additional supported mode'. May be you could file a bug 
report to XFree86's bugzilla <>.