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Date: Fri, 22 May 2015 10:42:13 +0300
From: Ivan Klymenko <fidaj@ukr.net>
To: Nikos Vassiliadis <nvass@gmx.com>
Cc: freebsd-stable@freebsd.org
Subject: Re: CPU frequency doesn't drop below 1200MHz (like it used to)
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Fri, 22 May 2015 09:33:15 +0200
Nikos Vassiliadis <nvass@gmx.com> =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=
=B2:

> Hi,
>=20
> I just noticed that my CPU's frequency doesn't support dropping
> below 1200MHz. It used to be able to go down to 150MHz, if I am
> not mistaken. I'd like it to go down to 600MHz via powerd, like
> it used to go. This is a month's old 10-STABLE.
>=20
> > [nik@moby ~]$ sysctl dev.cpu.0.freq_levels
> > dev.cpu.0.freq_levels: 2400/35000 2300/32872 2200/31127 2100/29417
> > 2000/27740 1900/26096 1800/24490 1700/22588 1600/21045 1500/19534
> > 1400/18055 1300/16611 1200/15194
>=20
> This is the CPU:
>  > hw.model: Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz
>=20
> Thanks in advance for any ideas,
> Nikos

Try changing the options in /boot/device.hints
hint.acpi_throttle.0.disabled=3D"0"
hint.p4tcc.0.disabled=3D"0"