Who's playing with scaling_max_freq?

From	Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups	linux.debian.user
Subject	Who's playing with scaling_max_freq?
Date	2016-04-27 03:00 +0200
Message-ID	<rslZD-sA-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Max scaling_max_freq seems stuck at 1GHz even though it should be able
to go up to 1.83GHz.

    # echo 1833000 >/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq; cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
    1000000
    # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
    1833000 1333000 1000000 
    #

This is on a Thinkpad T60 running Debian stable.  Any idea what might be
causing this?  Or at least, which part of the system might cause
scaling_max_freq to be (re)set to 1GHz right after I force-set it to 1.83GHz?
Would it be some daemon like systemd or rather than kernel?

This Thinkpad T60 is actually used as a desktop: it's parked in a dock
(with the lid is closed) where I have it connected to a keyboard and monitor.


        Stefan

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Thread

Who's playing with scaling_max_freq? Stefan Monnier <monnier@iro.umontreal.ca> - 2016-04-27 03:00 +0200
  Re: Who's playing with scaling_max_freq? humbert.olivier.1@free.fr - 2016-04-28 02:50 +0200
    Re: Who's playing with scaling_max_freq? Stefan Monnier <monnier@iro.umontreal.ca> - 2016-04-28 05:30 +0200
      Re: Who's playing with scaling_max_freq? deloptes <deloptes@gmail.com> - 2016-04-28 22:10 +0200
  Re: joe____Get_a_Samsung_Galaxy-S7 Joe Thompson <mydodge413@gmail.com> - 2016-04-28 19:40 +0200

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