2.6.22.9-91 hangs at different points during startup

[Jesus Jr M Salvo]

I currently have the following x86_64 kernels:

2.6.22.9-91.fc7
2.6.22.7-85.fc7

... on a Compaq Presario V6017AU with AMD Turion64 x2. Prior to
installing 2.6.22.9-91, I have been using 2.6.22.7-85 for some time
without any problems.

However, after installing 2.6.22.9-91, I could not even get to the
stage of logging in via X windows. I always get a freeze / hang during
startup ... but the freeze is not consistent, it is quite random.
Sometimes, during USB initialisation, sometimes after, etc...

The only thing that I have tried to find out the difference is
comparing the output in /var/log/messages between the 2 kernels. Some
of the differences that i found was:

1) The with .7-85 kernel, it was using a "Generic RTC driver" while
with the .9-91, it was using "Real Time Clock Driver v1.12ac". ( Are
they even different drivers or is it the same driver which changed
name from one version to another ? )

2) .7-85 kernel logged the message

kernel: drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

... while .9-91 did not log this message.

3) .7-85 kernel logged the messages:

kernel: rtc_cmos 00:07: rtc core: registered rtc_cmos as rtc0
kernel: rtc0: alarms up to one year, y3k

... which .9-91 did not log.

Can anyone recommend another way of finding out why I would get a
freeze during startup with .9-91 ?