After the installation of Red Hat 7 my system (a HP Omnibook 4150
notebook) does not boot linux but hangs after the "enabling Swap"
sequence. You can make it work, when you remove the line "modprobe
agpgart" from the file /etc/rc.d/rc.sysinit. If you give the
command "modprobe agpgart" during runtime, the system hangs immediately
and does not react on anything anymore. You need to turn the laptop off
and on again.
*** This bug has been marked as a duplicate of 18793 ***