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    SubjectRe: bug? acpi p-state + ondemand keeps dropping max freq
    On Mon, 16 Jun 2008 12:42:00 +0200
    Pavel Machek <pavel@suse.cz> wrote:

    > On Sat 2008-06-07 14:54:35, Arjan van de Ven wrote:
    > > On Sat, 7 Jun 2008 23:39:18 +0200
    > > Pavel Machek <pavel@suse.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
    >
    > > 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...
    >
    > In novel bugzilla case ignore_ppc=1 helped, so it seems to be BIOS
    > problem, not userland's...

    well as long as the user doesn't use this for production use... the
    BIOS often reduces frequencies available to deal with thermal
    situations, so it's not a good idea to ignore that.


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