ATHCOOL - reference manual online
Control power-saving mode on AMD Athlon/Duron CPUs.
Jul. 27, 2004
ATHCOOL(8) System Manager's Manual ATHCOOL(8)
NAME athcool - control power-saving mode on AMD Athlon/Duron CPUs SYNOPSIS athcool command DESCRIPTION athcool is a program that controls the power-saving mode on AMD Athlon/Duron CPUs. The parameter command is one of: on Enable power-saving mode. off Disable power-saving mode. stat Query power-saving mode. list List supported chipsets. WARNINGS athcool only sets/unsets the "Disconnect enable when STPGNT detected" bit in the north‐ bridge of the chipset. To save power, someone has to send the STPGNT signal when the CPU is idle. This is done by the ACPI subsystem when the C2 state is entered. Hence, you need ACPI support in your kernel to achieve power savings. Depending on your motherboard and/or hardware components, enabling power-saving mode may cause: * noisy or distorted sound playback, * a slowdown in disk performance, * system freezes or instability, * massive corruption of the filesystem (rare, but observed at least once). Before use athcool, you must recognize these potential DANGERS. Please use athcool AT YOUR OWN RISK. athcool is supplied "as is". The author disclaims all warranties, expressed or implied. The author and any other persons assume no liability for damages, direct or consequential, which may result from the use of athcool. SEE ALSO For more information about power-saving with Athlon/Duron CPUs, see the Athlon-Powersav‐ ing-HOWTO at http://www.daniel.nofftz.net/linux/Athlon-Powersaving-HOWTO.html.Jul. 27, 2004 ATHCOOL(8)