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From: Andrei Kolu <antik@bsd.ee>
To: freebsd-stable@freebsd.org
Date: Tue, 27 Feb 2007 13:48:03 +0200
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Subject: Re: Pentium 640 and Enhanced SpeedStep
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On Monday 26 February 2007 13:45, Andrei Kolu wrote:
> On Saturday 24 February 2007 7:51 pm, Andrei Kolu wrote:
> > FreeBSD 6.1-RELEASE-p11
> > Motherboard: Supermicro P8SCi
> > CPU: Pentium 4 640
> >
> > I have HyperThreading enabled...
> >
> > Enabling "powerd" gave me this error message:
> >
> > est0: <Enhanced SpeedStep Frequency Control> on cpu0
> > est1: <Enhanced SpeedStep Frequency Control> on cpu1
> > est: CPU supports Enhanced Speedstep, but is not recognized.
> > est: Please update driver or contact the maintainer.
> > est: cpu_vendor GenuineIntel, msr 102d0000102d, bus_clk, 64
> > device_attach: est1 attach returned 6
>
> OK, I figured it out by myself. Added cpufreq_load="YES"
> into /boot/loader.conf but got error:
>
> est0: <Enhanced SpeedStep Frequency Control> on cpu0
> p4tcc0: <CPU Frequency Thermal Control> on cpu0
> cpu1: <ACPI CPU> on acpi0
> est1: <Enhanced SpeedStep Frequency Control> on cpu1
> est: CPU supports Enhanced Speedstep, but is not recognized.
> est: Please update driver or contact the maintainer.
> est: cpu_vendor GenuineIntel, msr 102d0000102d, bus_clk, 64
> device_attach: est1 attach returned 6
> p4tcc1: <CPU Frequency Thermal Control> on cpu1
>
> BUT> # sysctl -a | grep dev.cpu

I found out what is caused problem with SpeedStep. I had to disable 
HyperThreading from BIOS and after that everything works just fine:

cpu0: <ACPI CPU> on acpi0
acpi_perf0: <ACPI CPU Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0

# sysctl dev.cpu
dev.cpu.0.freq: 900
dev.cpu.0.freq_levels: 3200/88000 2800/75000 2450/65625 2400/63000 2100/55125 
1800/47250 1500/39375 1200/31500 900/23625