Recent update of 7-BETA causes laptop to freeze on battery

Kevin Oberman oberman at
Wed Nov 7 11:52:52 PST 2007

> From: Chuck Swiger <cswiger at>
> Date: Wed, 7 Nov 2007 11:27:12 -0800
> On Nov 7, 2007, at 11:18 AM, Kevin Oberman wrote:
> > After an update of my laptop to 7-BETA2 on Nov. 4, I can no longer run
> > on battery. If I boot on battery, everything is normal until devd is
> > started. It immediately fires off /etc/rc.d/power_profile which
> > sets my system to C4.
> Can you adjust hw.acpi.cpu.cx_lowest to something like C2 instead of C4?

Yes, but it used to work fine at C4 and it saves a lot more power than
C2. In fact, C2 saves very little power. C3 has the same effect as
C4...useless system.
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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