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    SubjectRe: bug? acpi p-state + ondemand keeps dropping max freq
    Hi!

    > I've consistently experienced the following bizarre problem since 2.6.20, all the
    > way up to 2.6.25.3 (regressed yesterday and each of these kernels exposes this
    > behaviour):
    >
    > /sys/devices/system/cpu/cpu0/cpufreq # grep . *
    > affected_cpus:0
    > cpuinfo_cur_freq:800000
    > cpuinfo_max_freq:1866000
    > cpuinfo_min_freq:800000
    > scaling_available_frequencies:1866000 1600000 1333000 1066000 800000
    > scaling_available_governors:ondemand performance
    > scaling_cur_freq:800000
    > scaling_driver:acpi-cpufreq
    > scaling_governor:ondemand
    > scaling_max_freq:800000
    > scaling_min_freq:800000
    >
    >
    >
    > Notice that scaling_mx_freq dropped down to the lowest possible value and as such
    > my CPU is only working at 800MHz. At boot time this field properly displays
    > 1866MHz and everything works OK. After a certain period (?) this value drops down
    > and I cannot manually elevate it back to the normal level:
    >
    > # 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

    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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