To automagically generate a loadable kernel and initramfs with yaboot, genkernel need the option -- genzimage to be passed in the command line. See also bug #99195. Without this option genkernel exits witth an error and don't installs any kernel. Reproducible: Always Steps to Reproduce: 1. 2. 3. Actual Results: See closed bug #99195.
PPC-team (and JoseJX), mind taking a look at this one?
It's part of the 2005.1 documentation update in bug #99073.
JoseJX: if the fix is currently also needed for the network-based installation instructions you should add those already.
It's actually been fixed for PPC and is no longer absolutely required (unless you're using pegasos), but it's in all of the documentation drafts now.