Date: Thu, 07 Aug 2003 09:35:25 -0700 From: "Kevin Oberman" <oberman@es.net> To: Andreas Kohn <andreas.kohn@gmx.net> Cc: freebsd-mobile@freebsd.org Subject: Re: system power profile Message-ID: <20030807163525.131BA5D08@ptavv.es.net> In-Reply-To: Message from Andreas Kohn <andreas.kohn@gmx.net> <1060258006.368.7.camel@klamath.ankon.homeip.net>
next in thread | previous in thread | raw e-mail | index | archive | help
> From: Andreas Kohn <andreas.kohn@gmx.net> > Date: Thu, 07 Aug 2003 14:06:46 +0200 > Sender: owner-freebsd-mobile@freebsd.org > > > --=-shZJTKcNhhtCBRJjaz1l > Content-Type: text/plain > Content-Transfer-Encoding: quoted-printable > > Am Thu, 2003-08-07 um 06.23 schrieb Chris Collins: > > Hello > >=20 > > I have been running 5.1-stable on my Vaio 505GL for about a week now and > > things are working great. I am still trying to figure out a few things th= > at > > hopefully some of you can help me with. > >=20 > > I have noticed that when my laptop boots is selects a system power profil= > e > > 'economy' and I have also noticed a few times it has changed to profile > > 'performance'. My question is how can I define what these profiles are a= > nd > > how can I select them manually myself.=20 > The economy profile is selected when your laptop runs on battery power, > the performance profile when it is running on AC. (Some BIOS may allow > to select the profile preference also) > > You can use the hw.acpi.cpu.economy_speed and .performance_speed sysctl > to select the amount of CPU throttling. The hw.acpi.cpu.current_speed > contains the current speed :) and .max_speed contains the highest > possible value. > > Select the profile by unplugging/plugging-in your AC connector *g But don't assume that the CPU is actually changing in response to the change. I have seen multiple reports that some (many...all) systems don't actually change CPU speed when this changes. I use gkrellm's gkx86info plug-in to monitor the CPU speed. The speed on my system (and others from multiple vendors) is set by power status at boot time and never changes until the system is re-booted. this is true for both ACPI and APM. -- 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030807163525.131BA5D08>