24 bit display

Hi all,
This is coming from a user's box. System is RH6.1 with updates.

I tried running morpho with a 24 bit display:
    startx -- :0 -bpp 24  >& start24.log

The screen just blinks and I get the following message
at the end of my start24.log:

Fatal server error:
No "Display" subsection for -bpp depth 24

Any ideas? I assume he'll need to modify his X configs to add a Display
section for 24 bit, correct?

Thanks,
marco