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Date: Sun, 5 Jul 2009 01:30:01 -0700 From: Arjan van de Ven <arjan@...radead.org> To: Felix von Leitner <felix-linuxkernel@...e.de> Cc: Linux Kernel Mailing list <linux-kernel@...r.kernel.org> Subject: Re: Core i7 not scaling frequency down On Sat, 4 Jul 2009 22:37:32 +0200 Felix von Leitner <felix-linuxkernel@...e.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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