For some reason my processor always seems to run on full speed even if I don't do anything. Looking through the web, I've found quite some suggestions. According to http://www.thinkwiki.org/wiki/How_to_make_use_of_Dynamic_Frequency_Scaling I should be able to list my current governors.
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
cat: /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors: No such file or directory
But I cannot since /sys/devices/system/cpu/cpu0/cpufreq is not existing on my computer.
I have installed cpufreqd cpufrequtils and libcpufreq0, but because of the missing directory, I get
# /etc/init.d/cpufreqd start
* Starting CPU Frequency daemon cpufreqd [fail]
According to http://changelog.complete.org/archives/572-saving-power-with-cpu-frequency-scaling I should load one of the available modules.
# ls /lib/modules/`uname -r`/kernel/arch/*/kernel/cpu/cpufreq
p4-clockmod.ko pcc-cpufreq.ko speedstep-lib.ko
The only one that does not result in an error is the speedstep-lib.
# modprobe speedstep-lib
Any idea what I can do?
# lsmod |grep cpu
# lsmod |grep freq
# lsmod |grep acpi
thinkpad_acpi 81587 0
nvram 14419 1 thinkpad_acpi
snd 67382 14 snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,thinkpad_acpi,snd_seq_device
# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Core(TM) i7-2720QM CPU @ 2.20GHz stepping : 7 cpu MHz : 2192.750 cache size : 6144 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tp r_shadow vnmi flexpriority ept vpid bogomips : 4385.50 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
# cpufreq-info cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpufreq@vger.kernel.org, please. analyzing CPU 0: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms. analyzing CPU 1: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms. analyzing CPU 2: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms. analyzing CPU 3: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms. analyzing CPU 4: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms. analyzing CPU 5: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms. analyzing CPU 6: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms. analyzing CPU 7: no or unknown cpufreq driver is active on this CPU maximum transition latency: 4294.55 ms.
