[Bugme-new] [Bug 10982] New: scaling_max_freq locked
bugme-daemon at bugzilla.kernel.org
bugme-daemon at bugzilla.kernel.org
Wed Jun 25 14:22:52 PDT 2008
http://bugzilla.kernel.org/show_bug.cgi?id=10982
Summary: scaling_max_freq locked
Product: Power Management
Version: 2.5
KernelVersion: 2.6.25
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: cpufreq
AssignedTo: cpufreq at www.linux.org.uk
ReportedBy: nicolas.vinot at gmail.com
Distribution: Debian testing
Hardware Environment: IBM Thinkpad T42
Software Environment: 2.6.25 kernel
Problem Description:
Few minutes after boot, scaling_max_freq is locked to the lowest cpu speed.
Impossible to change it, even by hand or cpufreq-set.
root:cpufreq# pwd
/sys/devices/system/cpu/cpu0/cpufreq
root:cpufreq# cat scaling_driver
acpi-cpufreq
root:cpufreq# cat scaling_available_frequencies
1800000 1600000 1400000 1200000 1000000 800000 600000
root:cpufreq# cat scaling_available_governors
powersave userspace ondemand conservative performance
root:cpufreq# cat scaling_governor
ondemand
root:cpufreq# cat scaling_max_freq
600000
root:cpufreq# echo 1800000 > scaling_max_freq
root:cpufreq# cat scaling_max_freq
600000
root:cpufreq# cat cpuinfo_max_freq
1800000
root:cpufreq# cat cpuinfo_max_freq > scaling_max_freq
root:cpufreq# cat scaling_max_freq
600000
root:cpufreq# cpufreq-set -u 1800000
root:cpufreq# cat scaling_max_freq
600000
Before value locking, cpufreq works perfectly as it should.
This problem often occurs when the processor heats (high load, compilation...)
but randomly too (few minutes after boot, even if it does nothing).
Sometimes, after cpu cooling or cpufreqd reboot, I can manage again the speed
by hand.
My old kernel version (2.6.18 with speedstep-centrino driver) hasn't this
problem and cpufreqd works perfectly on it.
--
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.
More information about the Bugme-new
mailing list