RH7J Install is just fine. No problem at all, but booting up the system,
in rc.sysinit,   RH7J has "modprobe agpgart" lines.
This line lock-up HP NetServer E60.

This part is before the login, and even if I try to boot up as a single user
mode, still system execute rc.sysinit. So only a solution for this problem
is boot up the system by Install CD-ROM and mount HD then edit
rc.sysinit file.

# Load agpgart here. This is a hack, and will probably go away soon.
#if grep "driver: agpgart" /etc/sysconfig/hwconf >/dev/null 2>&1 ; then
#        modprobe agpgart >/dev/null 2>&1
#fi

I hope RH will fix this bug SOON.

Masanari iida 
HP-Japan