Messages in this thread | | | Date | Sun, 5 Jul 2009 01:30:01 -0700 | From | Arjan van de Ven <> | Subject | Re: Core i7 not scaling frequency down |
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On Sat, 4 Jul 2009 22:37:32 +0200 Felix von Leitner <felix-linuxkernel@fefe.de> wrote:
> Hi, > > I just got a Nehalem CPU and it works OK except that the fans are > always running full power and it produces heat like an oven. > > $ cat /proc/acpi/processor/P001/info > processor id: 0 > acpi id: 1 > bus mastering control: yes > power management: yes > throttling control: no > limit interface: no > $ > > Oh, no throttling and no limit support? How can this be? I'm using > 2.6.30 but this appears to be bogus; Windows scales down the CPU > frequency OK.
how do you determine linux isn't scaling down? PowerTOP? (if not powertop.. you might want to use that ;-)
> ACPI Warning (tbutils-0246): Incorrect checksum in table [OEMB] - > 00, should be FE [20090320]
that's pretty bad, but might not be a table critical for C/P states...
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
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