Date: Fri, 16 Jan 2004 13:36:54 -0800 From: "Kevin Oberman" <oberman@es.net> To: sebastian ssmoller <sebastian.ssmoller@web.de> Cc: freebsd-mobile@freebsd.org Subject: Re: hw.acpi.cpu.economy_speed Message-ID: <20040116213654.B74A85D07@ptavv.es.net> In-Reply-To: Message from sebastian ssmoller <sebastian.ssmoller@web.de> <1074283999.907.9.camel@tyrael.linnet>
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> From: sebastian ssmoller <sebastian.ssmoller@web.de> > Date: Fri, 16 Jan 2004 21:13:19 +0100 > Sender: owner-freebsd-mobile@freebsd.org > > hi, > i noticed that this sysctl flag is not longer supported. what should one > use instead to handle different cpu speed when running battery ? Use hw.acpi.cpu.thottle_state is the thing. It may be set to a value between 1 and hw.acpi.cpu.throttle_max where throttle_max is full speed. If you have a Centrino or P4-M, you can also save power by use of hw.acpi.cpu.cx_lowest. It can be set to 0-2 which enables "deeper sleep" when the system is idle. Not all states are available on all systems. The higher values will result in a longer time to wake up after the CPU becomes idle, but will use less power. Both of these have values in /etc/defaults/rc.conf, but I don't think Nate has hooked those up, yet. At the moment you need to set them manually. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634
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