special resolution with xorg

[Nic Duerr]

>>I have a PCG-C1VN PictureBook with a 1024x480 LCD, and the automatic
>>configuration in Slackware-10.2 set up xorg.conf properly without any
>>tweaking.  On my laptop, the video card was detected as an ATI Rage
>>Mobility P/M, and uses the ati driver.  I don't know whether Sony used
>>different video chipsets in other PictureBooks.
>>    
>>
>
>Actually, it sounds like Sony's panel isn't responding to EDID requests, or 
>that Neomagic chip doesn't support EDID, or the driver for that chip doesn't 
>support it... which means Xorg can't autodetect useful information, and 
>doesn't know the panel supports 1024x480.
>
>  
>
The 'EDID' keyword is already a nice hint, thanks.
I'll try tomorrow to get this read-edid program I just found running and 
see what it says.

Is there any known way to override these settings and force xorg to use 
a resolution it would normally discard?