Note - this is for lorax. I chose a couple of resolutions in 16 and 32 bpp during install. When trying to run X later, it didn't start complaining about not finding any specified 8 bpp mode in the XF86Config. Just adding a "DefaultColorDepth" in the screen section solves this.
is this still a problem when using 6.2?
this behavior does not occur in 6.2 ... I selected all 16, 32 bit modes (no 8 bit modes) during install ... after reboot, X successfully started up ... a default color depth was set in the XF86Config file ...