• ​https://wiki.archlinux.org/index.php/CPU_Frequency_Scaling

• ​動的にCPUクロックや電圧を変更するcpufreqの概要とcpufreqdデーモンについて - 試験運用中なLinux備忘録
• ​cpufreqdでlm_sensorsを使用して、センサの値に応じたクロック・電圧制御を行う - 試験運用中なLinux備忘録

• ​FS#15284 : cannot switch to ondemand governor

  I have a Intel(R) Pentium(R) 4 CPU 2.66GHz
  im using p4-clockmod with ondemand and performance governors, but after upgrading to kernel 2.6.30, i cannot switch to ondemand governor 
  
  from dmesg output i see:
  "ondemand governor failed, too long transition latency of HW, fallback to performance governor"
  
  Additional info:
  kernel26 2.6.30-5
  
  Steps to reproduce:
  cpufreq-set -g ondemand
  

  • comment by Jan de Groot (JGC) - Saturday, 27 June 2009, 07:33 GMT-4
    • You should not use ondemand with clockmod. The clockmod module has a very high switching latency, that's why it's disabled in 2.6.30. The error message says it all I think.

• ​cpufreq ondemand governor problem with p4-clockmod |SOLVED| (Page 1) / Kernel & Hardware / Arch Linux Forums