1- Gentoo does not support more Xfree. Therefore the files XF86Config.in and XF86Config-4.in are not necessary 2- The directory /usr/X11R6/lib has changed to /usr/lib 3- The use of "font":unscaled is deprecated 4- It would be better to put one only list of fonts standard 5- Option "XkbRules" "xfree86" must be changed to: Option "XkbRules" "xorg" 6- The keyboard driver 'keyboard' will be replaced soon by the driver 'kbd'. All these changes are in the patch Reproducible: Always Steps to Reproduce: 1. 2. 3.
Created attachment 49892 [details, diff] xorg.conf.in - proposed patch
Actually, I hadn't made these changes simply because xorg-x11-6.8.0-r4 hadn't gone stable yet. That, and if you're building an X-enabled LiveCD with the ati-drivers on it, you're still stuck with with xorg-x11-6.7.0-r3 until the new ati-drivers become stable. I will definitely apply this patch, but only after the new ati-drivers go stable, which means everybody will be on >=xorg-x11-6.8.0-r4 and these will make sense. Otherwise, changing the keyboard or the font paths will break on the older versions.
This was fixed in mkxf86config 0.9...