Sure enough.  Guess I just missed the update to 1.18 when I cvs updated! 
  Sorry for the noise, it works great now.  Thanks Juan!

	ScottE

Juan RP wrote:
> 
> Can you please try with powernow_k8.c 1.18? looks like that msr_read 
> needs to be
> initialized, this was reported by FUKUMOTO Atsushi and it should avoid 
> the hang.
> 
> 
> ----- Original Message ----- From: "Scott Ellis" <scotte@warped.com>
> To: <current-users@netbsd.org>
> Sent: Tuesday, April 03, 2007 4:52 AM
> Subject: Failure of PowerNow! on amd64 -current
> 
> 
>> I upgraded my amd64 system from -current Feb 22 to -current Apr 2, and 
>> found that PowerNow! seems to cause an immediate hang (not even 
>> dropping to DDB...just a solid lockup).
>>
>> Here's what I get in single-user, changing the frequency manually:
>>
>> # sysctl -a | grep power
>> sysctl: warning: /var/run/dev.db: No such file or directory
>> machdep.powernow.frequency.target = 2200
>> machdep.powernow.frequency.current = 2200
>> machdep.powernow.frequency.available = 1000 1800 2000 2200
>> # sysctl -w machdep.powernow.frequency.target=1000
>> k
>>
>> (yes, that "k" is all that's printed before the hang...it may be the 
>> last gasp of the serial port before the crash!)
>>
>> The above (and more importantly, estd) works fine on the Feb 22 kernel.
>>
>> What info can I collect to help debug?
>