xorg video modes question

[Fred <fred@blakemfg.com>]

Hello,

I am running Debian 6.0 on a Sun Ultra 5 with a Sun 7205a LCD.  The 
video mode defaults to 800x600 which is causing problems with the 
openbox window manager.  The video mode probably needs to be set to 
1280x1024 but I have been unable to determine how to do this.  There is 
no longer an xorg command to run with -configure to give an xorg.conf 
file to edit and I have not been able to generate one that X will 
accept.  I know the major timing numbers for the LCD but do not know 
what to use for "Video Card".  What should I do to change the video mode?

Best regards,
Fred