You might try setting a default bit depth of 8, 15 or 16 (15 is 
better).  I think the 24 bit is the problem, that it cannot do a 24bit 
screen.  The Mach64 GT is notoriously problematic chipset :(

Also what video driver are you booting with?  If you've set the "no 
video driver" option in BootX this will cause you problems as X can't 
run with the ati driver if you're running offb.  a quick dmesg  | grep 
fb should tell you what video driver you are using.

Mark

On Wednesday, June 4, 2003, at 06:54 PM, Andrew Gaffney wrote:

>   After almost a day of compiling, I've got X installed on my PowerMac 
> 7500. Unfortunately, I can't get X working right. I keep getting that 
> annoying "No screens found" error message. I originally tried using 'X 
> -configure' and tweaking it from there. I specified the HorizSync and 
> VertRefresh from 
> <http://docs.info.apple.com/article.html?artnum=112529> for my 
> monitor. I tried using the fbdev driver instead of the ati driver. X 
> starts, but the color is very, very messed up. I tried using Xeasyconf 
> and using all the default options. That didn't get me anywhere either. 
> Here's my current XF86Config as generated by Xeasyconf:
>


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