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cpufreq limits avilable frequencies to 800MHz on git kernel

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From: Arkadiusz Miskiewicz <arekm@...>
To: <linux-kernel@...>, <cpufreq@...>
Subject: cpufreq limits avilable frequencies to 800MHz on git kernel
Date: Friday, May 23, 2008 - 1:44 pm

thinkpad z60m, Intel(R) Pentium(R) M processor 2.00GHz. kernel from git fro=
m=20
1-2 days ago.=20

Unfortunately it seems that suspend to ram/resume causes frequency
to be limited to 800MHz only. I can't set it to 2GHz again :-/

scaling_max_freq is then 800000 and cannot be changed.

reboot and the problem disappears until new suspend/resume cycle.

cpufreq stuff is driven by acpi-cpufreq

$ cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0
  hardware limits: 800 MHz - 2.00 GHz
  available frequency steps: 2.00 GHz, 1.60 GHz, 1.33 GHz, 1.07 GHz, 800 MHz
  available cpufreq governors: powersave, userspace, ondemand, performance
  current policy: frequency should be within 800 MHz and 800 MHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.

/sys/devices/system/cpu/cpu0/cpufreq/affected_cpus:0
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq:800000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq:2000000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq:800000
/sys/devices/system/cpu/cpu0/cpufreq/related_cpus:0
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies:2000000=
=20
1600000 1333000 1066000 800000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:powersave=
=20
userspace ondemand performance
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:800000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:acpi-cpufreq
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:performance
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:800000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:800000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed:<unsupported>

=2D-=20
Arkadiusz Mi=C5=9Bkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/
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Messages in current thread:
cpufreq limits avilable frequencies to 800MHz on git kernel, Arkadiusz Miskiewicz, (Fri May 23, 1:44 pm)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Andrew Morton, (Fri May 23, 9:25 pm)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Arkadiusz Miskiewicz, (Sun May 25, 5:36 am)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Thomas Renninger, (Sun May 25, 11:03 am)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Arkadiusz Miskiewicz, (Mon May 26, 3:07 am)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Thomas Renninger, (Mon May 26, 8:28 am)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Thomas Renninger, (Mon May 26, 7:37 am)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Arkadiusz Miskiewicz, (Mon May 26, 12:15 pm)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Thomas Renninger, (Tue May 27, 5:35 am)
Re: cpufreq limits avilable frequencies to 800MHz on git ker..., Arkadiusz Miskiewicz, (Mon May 26, 12:23 pm)
[PATCH] Re: cpufreq limits avilable frequencies to 800MHz on..., Thomas Renninger, (Thu Jul 17, 9:48 am)
Re: [PATCH] Re: cpufreq limits avilable frequencies to 800MH..., Andrew Morton, (Thu Jul 17, 5:40 pm)
Re: [PATCH] Re: cpufreq limits avilable frequencies to 800MH..., Thomas Renninger, (Thu Jul 17, 10:46 pm)