linux-kernel - cpufreq limits avilable frequencies to 800MHz on git kernel

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Date:	Fri, 23 May 2008 19:44:57 +0200
From:	Arkadiusz Miskiewicz <arekm@...en.pl>
To:	linux-kernel@...r.kernel.org, cpufreq@...ts.linux.org.uk
Subject: cpufreq limits avilable frequencies to 800MHz on git kernel


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

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@...do.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 
1600000 1333000 1066000 800000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:powersave 
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>

-- 
Arkadiusz Miśkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/

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