When the initrd system is trying to mount my new root in STEP 4a I get this message: STEP 4A: MOUNTING ROOT mount: mounting /dev/hda4 on /newroot failed: Invalid argument Could not mount specified ROOT, try again Root block device unspecified or not detected Please specify root device to boot, or "shell" for shell : And it doesn't matter if I try to specify the /dev/hda4 filesys again, I keep getting this message. Other users run into this problem as well: http://forums.gentoo.org/viewtopic.php?p=859929 Reproducible: Always Steps to Reproduce: 1. genkernel --bootsplash all 2. configure grub as the installation documentation says - and genkernel emerge message 3. reboot Actual Results: See summary details.
RESOLVED. I ran "emerge system" and then I ran genkernel with --menuconfig, changed the ReiserFS from a Module build to Built-in (*) and it worked. People still having trouble should read /usr/share/doc/genkernel/README