Powerd makes computer hang

[Kevin Oberman]

> Date: Thu, 24 Aug 2006 16:47:38 +1000
> From: Peter Jeremy <peterjeremy at optushome.com.au>
> Sender: owner-freebsd-acpi at freebsd.org
> 
> I've just upgraded my HP nx6125 to an up-to-date -current and
> my powerd(8) emulator[1] still wedges it solid.
> 
> [1] A perl script that pseudo-randomly changes dev.cpu.0.freq
> 
> -- 
> Peter Jeremy

Peter,

One think I have noticed is that some slower speeds available with P4TCC
throttling will cause the system to lock. This has always been the
case. On my T30 which was a P4-M at, the lowest speeds available with
P4TCC available was 75 or 100 MHz and setting my speed to either of the
two lowest values would lock the system. I patched powerd to prevent
either of these from being selected and everything worked form that
point.

That was a MUCH older version of powerd (at least from early last year)
and I no longer have the T30.

My new T43 seems to not have this problem. It runs flawlessly at all
speeds, whether I enable EST (cpufreq) or not. The system clearly does
better with cpufreq than without, but it falsely reports CPU speed with
cpufreq. 
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751