Enhanced SpeedStep hosed in -current ?

Kevin Oberman oberman at es.net
Sun Mar 16 20:34:16 PDT 2008

> Date: Mon, 17 Mar 2008 02:43:19 +0000
> From: "Igor Mozolevsky" <igor at hybrid-lab.co.uk>
> Sender: owner-freebsd-current at freebsd.org
> On 16/03/2008, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> >
> >  It looks like my laptop runs full speed at all times, no matter what
> >  powerd or I may desire.
> >
> >  Looks like the EST driver is (suddenly ?) not happy about the system.
> I thought that this could've been related to the lapic frequency
> madness I was seeing in RELENG_7 on my T43p, so I axed cpufreq from
> kernel config, and the problem's gone... So, it does seem like
> something is not quite in cpufreq > RELENG_7_0...

My experience with my T43 (not T43p) is that it does not play well with
cpufreq. This is not new to 7-Stable. I have been seeing it since the
system was new, just over 2 years ago. I always build my kernel without

Aside from the sort of thing you saw, I also saw misbehavior in
switching between battery and AC and powerd did odd things. Without
cpufreq, it runs well in all respects.
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU_
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 2000
dev.cpu.0.freq_levels: 2000/27000 1750/23625 1600/22600 1400/19775 1333/19666 1166/17207 1066/16733 932/14641 800/13800 700/12075 600/10350 500/8625 400/6900 300/5175 200/3450 100/1725
dev.cpu.0.cx_supported: C1/1 C2/1 C3/85 C4/185
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00% 0.00% 0.00% 0.00%
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
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