SMP opteron frustrations

[Isaac Yonemoto]

i'm having a bit of difficulty getting the cpufreq operating correctly on
my machine.  It's a dual opteron 242/1.6GHz (ZMax DP) box running a
freshly recompiled FBSD 6.0, SMP enabled in the kernel.  In my BIOS I have
ACPI enabled and APM disabled.

I have

cpufreq_load="YES"

in loader.conf, and kldstat shows that cpufreq.ko is running, however,
wher I run sysctl -a I see no

hw.powernow*
dev.powernow* entries

and

dev.cpu.0.%driver="cpufreq"

instead of "powernow", and there are no entries in dev.cpu.1

running powerd on boot (in rc.conf) causes a total system hang 5 seconds
after activation (just as I'm typing in "roo" at the login prompt).

it seems like I'm missing the powernow device driver -- I saw powernow.c
in /usr/src/sys/i386/cpufreq, but not in the corresponding .../amd64
directory (not even a cpufreq directory there!) Am I missing something
here, and why isn't sysctl outputting for dev.cpu.1??

Isaac Yonemoto