I dont think that the issue is solved. fcopy leaves the original file on the 
disk as /etc/modprobe.d/radeon-kms.conf.pre_fcopy.conf which gets evaluated 
after /etc/modprobe.d/radeon-kms.conf

To test it start the daily and run modprobe radeon, dmesg shows that kms for 
radeon is enabled. 

Solution run
find /etc -name *pre_fcopy* -xargs rm -f \{\}\; in 
etc/grml/fai/grml/grml_cleanup_chroot 

This also deletes btw. /etc/network/interfaces.pre_fcopy ;0