Date: Fri, 26 Dec 2008 19:12:26 -0800 From: "Garrett Cooper" <yanefbsd@gmail.com> To: "David van Kuijk" <dynasore@bigfoot.com> Cc: acpi <acpi@freebsd.org> Subject: Re: Problem on AMD64 Message-ID: <7d6fde3d0812261912r1d5abd6cic1513f11cc59f1c5@mail.gmail.com> In-Reply-To: <49534F10.7040305@bigfoot.com> References: <20081221233822.7E92545020@ptavv.es.net> <49500088.2080609@bigfoot.com> <7d6fde3d0812221315s4d03e15dw4b84679b98a6308f@mail.gmail.com> <49534F10.7040305@bigfoot.com>
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On Thu, Dec 25, 2008 at 1:14 AM, David van Kuijk <dynasore@bigfoot.com> wrote: > > > >>>>> >>>>> Thanks for the responses so far. >>>>> >>>>> I would be happy with S3. I am however a little confused about the >>>>> abilities of my server as reported by sysctl hw.acpi. >>>>> >>>>> As commented below this line suggests that no other states than S4/S5 >>>>> are supported: >>>>> hw.acpi.supported_sleep_state: S4 S5 >>>>> >>>>> But this is also listed: >>>>> hw.acpi.standby_state: S1 >>>>> hw.acpi.suspend_state: S3 >>>>> >>>>> Are these last two overridden by the first, meaning that S3 is not >>>>> available from my BIOS??? >>>> >>>> Yes. FreeBSD, by default, sets up standby as S1 and suspend to S3 >>>> because >>>> almost all BIOSes support these states. Yours is the first BIOS I have >>>> seen that does not do S1. That is really odd. >>>> >>>> In any case, you have no available ways to cut power when your system is >>>> really idle other than powering off. Of course, you may be able to do >>>> some power saving with powerd and EST if your BIOS and CPU support >>>> those. >> >> Look into the following sysctls: >> >> hw.acpi.cpu.cx_lowest >> hw.acpi.cpu.cx_highest >> > > I tried to find out what I can do with those sysctls. > hw.acpi.cpu.cx_highest is not available on my system. > hw.acpi.cpu.cx_lowest is available and can be set. Are you suggesting I > should set it to C2 or C3??? > > A second question; > When I use powerd it switches between clock-frequencies of 1800 and 1000 > correctly. Is it possible to set a sysctl so that even lower frequencies are > supported, or are the supported frequencies simply dictated by the > processors in my server (in my case Opteron 1.8 GHz)? > > Cheers, > David Dog gone it I've been typo'ing that for a long time (see http://lists.freebsd.org/pipermail/cvs-all/2003-November/036370.html). Try: hw.acpi.cpu.cx.lowest hw.acpi.cpu.cx.highest Note that the underscores were in fact periods. Cheers, -Garrett
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