Date: Mon, 20 Feb 2006 13:44:06 +1100 From: "Dave Symonds" <dsymonds@gmail.com> To: "Kevin Oberman" <oberman@es.net> Cc: freebsd-stable@freebsd.org Subject: Re: Need serious help with Dell D600 Latitude laptop and Power Management please :) Message-ID: <ee77f5c20602191844n2c5c583ah9724c1a1a5944a39@mail.gmail.com> In-Reply-To: <20060220020235.4C98645043@ptavv.es.net> References: <ee77f5c20602191451m3ccc8cb5obdd39ad1aed09764@mail.gmail.com> <20060220020235.4C98645043@ptavv.es.net>
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On 2/20/06, Kevin Oberman <oberman@es.net> wrote: > There are many things that can help. > > First, I don't see a reason for "-a adaptive" on powerd. If you are > plugged in, why cut performance? Often my laptop is not doing anything, so I drop the speed to minimise power consumption, and thus heat and noise. > Try "sysctl hw.acpi.cpu" and see what values you have for cx_lowest while > on battery. It should be the largest "C" value available, usually 3C43 > or C4. This is very significant. To change this, use the following in > rc.conf: > economy_cx_lowest=3D"LOW" > This is now the default in -current, but that change has not gone into > anything else. I'll give this a go. > If you can run without USB, take it out of yo9ur kernel. It will keep > your system way to busy, even if nothing is plugged into any USB port. This might be trickier. I'll have to do some fancy shell scripting to load/unload kernel modules. Most of the time I'm on battery I'm not using any USB devices, so this should cut my power drain considerably. Dave. -- "Strange women lying in ponds distributing swords is no basis for a system of government."
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