Date: Sun, 2 May 2004 01:22:51 -0400 From: James Snow <snow@teardrop.org> To: Kevin Oberman <oberman@es.net> Cc: freebsd-mobile@freebsd.org Subject: Re: Laptop ACPI question Message-ID: <20040502052251.GA39933@teardrop.org> In-Reply-To: <20040501210536.5FF525D0E@ptavv.es.net> References: <003001c42fbb$11ce5060$f700000a@ape> <20040501210536.5FF525D0E@ptavv.es.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, May 01, 2004 at 02:05:36PM -0700, Kevin Oberman wrote: > > Actually, ACPI will greatly improve battery life soon, but not yet. The > bits and pieces are being fed into CURRENT and I suspect that SpeedStep > support will be coming soon. > In the meantime, you can use sysctls to manually adjust CPU performance > to enhance battery life. > > Look at: > hw.acpi.cpu.throttle_max: 8 > hw.acpi.cpu.throttle_state: 8 > hw.acpi.cpu.cx_supported: C1/0 C2/1 C3/85 > hw.acpi.cpu.cx_lowest: 0 > hw.acpi.cpu.cx_history: 1453705/0 0/0 0/0 Hmm. In 5.2.1-p5, I don't have anything under hw.acpi.cpu labeled .throttle*. I do, however, have these: hw.acpi.cpu.max_speed: 8 hw.acpi.cpu.current_speed: 1 hw.acpi.cpu.performance_speed: 8 hw.acpi.cpu.economy_speed: 1 acpi(4) seems to suggest that these will alter CPU speed, and presumably battery life as well. Is this not the case? -Snow
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040502052251.GA39933>