Messages in this thread | | | Date | Fri, 23 May 2008 18:25:07 -0700 | From | Andrew Morton <> | Subject | Re: cpufreq limits avilable frequencies to 800MHz on git kernel |
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On Fri, 23 May 2008 19:44:57 +0200 Arkadiusz Miskiewicz <arekm@maven.pl> wrote:
> 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@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 > 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>
Thanks. Is this a newly-occurring bug or did earlier kernels do this also?
If it was newly added, do you know in which kernel version we might have added it?
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