Date: 11 Mar 2004 08:21:35 -0700 From: llewelly@xmission.com To: "antic_eye" <info@antic-eye.de> Cc: freebsd-mobile@freebsd.org Subject: Re: PowerNow in mobile AthlonXP Message-ID: <s3rishbv280.fsf@xmission.xmission.com> In-Reply-To: <74EC3F3BA88A824FA61D3FD88097DB821915EF@ITIServer03.iti> References: <74EC3F3BA88A824FA61D3FD88097DB821915EF@ITIServer03.iti>
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"antic_eye" <info@antic-eye.de> writes:
> Hi there,
>
> I googled all the web for a solution, so I hope you could help me. I
> have a PackardBell Laptop with a mobile athlon xp inside. I installed
> FreeBSD 5.2.1 3 weeks ago and everything works fine. Even the screen
> flickering under x I fixed (it lasts me one week :o)).
>
> My problem is, that I dont know how to trottle the cpu frequency. Linux
> has the cpufreqd. Is there anything appropriate in BSD? ACPI is up and
> running (expect the StandBy mode - it doesn't work)
[snip]
Read 'man acpi' and search for 'speed' . You want to read about two
sysctls:
hw.acpi.cpu.performance_speed
hw.acpi.cpu.economy_speed
I have a very different laptop (dell inspiron 5k w/pentium III at
600mhz), but I can throttle my cpu clockspeed by:
# sysctl hw.acpi.cpu.performance_speed=1
hw.acpi.cpu.performance_speed: 8 -> 1
'sysctl -a | grep acpi.cpu' is also useful.
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