linux-kernel - Re: bug? acpi p-state + ondemand keeps dropping max freq

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Message-ID: <20080607233640.GA9266@homac>
Date:	Sun, 8 Jun 2008 01:36:40 +0200
From:	Holger Macht <hmacht@...e.de>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Pavel Machek <pavel@...e.cz>, auke-jan.h.kok@...el.com,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	len.brown@...el.com, cpufreq@...ts.linux.org.uk,
	davej@...emonkey.org.uk
Subject: Re: bug? acpi p-state + ondemand keeps dropping max freq

On Sat 07. Jun - 14:54:35, Arjan van de Ven wrote:
> On Sat, 7 Jun 2008 23:39:18 +0200
> Pavel Machek <pavel@...e.cz> wrote:
> 
> > > # echo 1866000 > scaling_max_freq ; cat scaling_max_freq
> > > 800000
> > > # echo 1866000 > scaling_max_freq ; cat scaling_max_freq
> > > 800000
> > > 
> > > 
> > > This renders my Dothan to utterly poor speeds. (standard T43)
> > > 
> > > performance cpufreq governor makes no difference - I still can't
> > > change the frequency upper/lower values.
> > 
> > Hmm, I have similar problem in Novell bugzilla, on very different hw:
> > 
> > https://bugzilla.novell.com/show_bug.cgi?id=396311
> > 
> > 								Pavel
> > 
> 
> 
> are either of you running gnome-power-manager or kpowersaved ?
> sometimes these programs (and more likely, the patches added by a
> distro maintainer who doesn't fully realize how power works) tend to
> muck with kernel settings around CPU frequency that they have
> absolutely no business touching...

I'm not aware of any 'brand' of kpowersave or gnome-power-manager which
could interfere here. Nor I'm aware of any backends in recent distros
which tweak the 'max freq' knobs. So I don't think this can be related. Or
please be a little bit more detailed about what you're referring to...

Regards,
	Holger
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