From: Arjan van de Ven <arjan@infradead.org>
To: Felix von Leitner <felix-linuxkernel@fefe.de>
Cc: Linux Kernel Mailing list <linux-kernel@vger.kernel.org>
Subject: Re: Core i7 not scaling frequency down
Date: Sun, 5 Jul 2009 01:30:01 -0700 [thread overview]
Message-ID: <20090705013001.6e0c17bf@infradead.org> (raw)
In-Reply-To: <20090704203732.GA20170@codeblau.de>
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
prev parent reply other threads:[~2009-07-05 8:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-04 20:37 Core i7 not scaling frequency down Felix von Leitner
2009-07-04 21:24 ` Frans Pop
2009-07-05 8:30 ` Arjan van de Ven [this message]
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