Projects / cpudyn


cpudyn controls the speed in Intel SpeedStep, Pentium 4 Mobile, and PowerPC machines with the cpufreq driver compiled in the kernel. It saves battery, lowers temperature, and can put the computer disks in standby mode if a given period has passed without any I/O operation. It works well even with journaled file systems such as Ext3, XFS, or ReiserFS.

Operating Systems

Recent releases

  •  19 Mar 2005 11:47

    Release Notes: The frequencies table is now sorted to avoid bugs in some BIOS implementations when -minf is used. The program now checks for /proc/acpi/processor/CPU/ directories.

    •  30 May 2004 16:07

      Release Notes: A segmentation fault which occurred when ACPI throttling is enabled was fixed. A typo in cpudyn.redhat was fixed. A Makefile and start script for Slackware was added. Support was added for Acer laptops. A small chkconfig problem in the RedHat init script was fixed.

      •  13 Feb 2004 22:30

        Release Notes: A function to exploit stat times available in the 2.6 kernel has been added. The numbers are much more precise than the previous one, which still exists just for 2.4. An "-ms" option has been added to allow interval specification in milliseconds. ASUS LED support has been added. Usage, help, and man page options have been reorganized.

        •  15 Jan 2004 01:24

          Release Notes: This release won't print the "Frequencies not available" message if the user does not specify the -minf option. It just confused the user.

          •  11 Jan 2004 21:05

            Release Notes: A -minf option has been added to set up the minimum frequency in powersave mode. An -X option has been added to only run the initialisation code, show messages, and exit.


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