Skip site navigation (1)Skip section navigation (2)
Date:      Fri, 11 Jun 2004 10:19:28 +1200
From:      Drew Broadley <drew@corrupt.co.nz>
To:        =?ISO-8859-1?Q?Eduardo_M=EDnguez_P=E9rez?= <e-minguez@seznam.cz>
Cc:        freebsd-mobile@freebsd.org
Subject:   Re: FreeBSD & SpeedStep
Message-ID:  <40C8DE70.5040902@corrupt.co.nz>
In-Reply-To: <1086904021.1915.9.camel@localhost>
References:  <1086904021.1915.9.camel@localhost>

next in thread | previous in thread | raw e-mail | index | archive | help
Eduardo Mínguez Pérez wrote:

>Hi!
>This is my first mail to the list and I want to sorry for my english
>(I'm spanish ;D)
>My question is... Is speedstep supported by FreeBSD? My notebook is a p4
>mobile (1,7 Ghz)
>I'm using cpydyn or cpufreq under linux... and it works fine. It speed
>up or down my cpu frequency if needed.
>I've read something in 5.2.1 with acpi... but I don't know if it's like
>linux. Any idea?
>Thanks a lot ;)
>
>  
>
# sysctl hw.acpi  | grep cpu
hw.acpi.cpu.throttle_max: 8
hw.acpi.cpu.throttle_state: 8
hw.acpi.cpu.cx_supported: C1/1 C2/2 C3/185
hw.acpi.cpu.cx_lowest: C1
hw.acpi.cpu.cx_usage: 99% 0% 0%

When unplugging the AC to and from my laptop I get the following in dmesg:

cpu0: Performance states changed
cpu0: Performance states changed

Hopefully that answers your question :)

- Drew








Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?40C8DE70.5040902>