From: Daniel Gryniewicz <dang@fprintf.net>
To: Robert Love <rml@ximian.com>
Cc: Dave Jones <davej@redhat.com>,
Matthew Garrett <mgarrett@chiark.greenend.org.uk>,
linux-kernel@vger.kernel.org
Subject: Re: Laptops & CPU frequency
Date: Wed, 14 Jan 2004 14:23:27 -0500 [thread overview]
Message-ID: <1074108207.5935.15.camel@localhost> (raw)
In-Reply-To: <1074107842.1153.959.camel@localhost>
On Wed, 2004-01-14 at 14:17, Robert Love wrote:
> Dave did not mean that the other power management schemes cannot do the
> automatic reduction on loss of AC, just that there is no SMM/BIOS hacks
> to do it automatically.
>
> Your APM scripts are probably adjusting your CPU speed when you go on
> AC. Fedora does this, for example.
No APM scripts, no APM even. I have ACPI, but no acpid, and I don't
currently do anything with ACPI other than get battery status and
temperature. It also happened before I built in any cpufreq support.
> That is cool - the OS (user-space, even) controls the policy.
>
> What we don't like is how SpeedStep can be controlled from SMM.
This happens even booted into DOS, so it's definitely a BIOS thing. I
haven't looked into turning it off, I can check next time I reboot.
--
Daniel Gryniewicz <dang@fprintf.net>
next prev parent reply other threads:[~2004-01-14 19:26 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-11 2:56 Laptops & CPU frequency jlnance
2004-01-11 3:17 ` Robert Love
2004-01-11 4:12 ` Valdis.Kletnieks
2004-01-11 6:16 ` Willy Tarreau
2004-01-11 10:27 ` Xavier Bestel
2004-01-11 10:33 ` Xavier Bestel
2004-01-12 16:58 ` Jerry Cooperstein
2004-01-12 21:19 ` Xavier Bestel
2004-01-12 19:52 ` john stultz
2004-01-12 20:11 ` Disconnect
2004-01-12 23:19 ` john stultz
2004-01-12 21:28 ` Xavier Bestel
2004-01-12 22:07 ` john stultz
2004-01-13 9:13 ` Xavier Bestel
2004-01-11 17:06 ` Matthew Garrett
2004-01-11 17:13 ` Robert Love
2004-01-11 17:44 ` Matthew Garrett
2004-01-11 17:54 ` Robert Love
2004-01-14 4:59 ` Dave Jones
2004-01-14 19:11 ` Daniel Gryniewicz
2004-01-14 19:17 ` Robert Love
2004-01-14 19:23 ` Daniel Gryniewicz [this message]
2004-01-15 20:42 ` Pavel Machek
2004-01-15 21:18 ` Daniel Gryniewicz
2004-01-15 22:21 ` John Bradford
2004-01-15 22:48 ` Pavel Machek
2004-01-19 17:44 ` Ducrot Bruno
2004-01-16 10:47 ` Pavel Machek
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