F14 Uses Wrong Resolution on Dell C600 Laptop

[Craig Lanning]

I have a Dell Latitude C600 which will only display at 800x600.

$ lspci -s 01:00.0
01:00.0 VGA compatible controller: ATI Technologies Inc Rage Mobility M3 AGP 2x (rev 02)

$ xrandr
Screen 0: minimum 640 x 480, current 800 x 600, maximum 800 x 600
default connected 800x600+0+0 0mm x 0mm
   800x600        60.0*    56.0  
   640x480        60.0  

I tried adding 'nomodeset' to the kernel boot line, but that had no
effect.

I tried adding 'video=aty128fb:1400x1050' to the kernel boot line, but
that, also, had no effect.

Is there a way to get this machine to use the 1400x1050 natural
resolution of the LDC?

Craig