Laptop Mode Tools - program which you have to have

There are many laptop power saving managers, I tested a lot of them but only one meet my expectations, which isn't so strict. This manager or rather set of a tools is of course Laptop Mode Tools, its posibilities are incredible, it takes care whole your hardware and software, you need to only fit configuration to your requirements. All configuration files are located in path:

/etc/laptop-mode

Directory contains following files/directories:

• laptop-mode.conf  - main, most important configuration file
• lm-profiler.conf - configuration file of lm-profiler tool, lm-profiler detects processes that use system resources and that cause activity of hard disc drive and help disable them
• batt-start, batt-stop - directories containing scripts which will be executed depend on battery mode is starts or stops
• lm-ac-start, lm-ac-stop - directories containing scripts which will be executed in case AC mode starts or stops and laptop-mode management is active during working on AC
• nolm-ac-start, nolm-ac-stop - ame as above, but in case laptop-mode management is inactive during working on AC
• conf.d - directory containing additional configuration files targeted to special parts of system like ethernet card, lcd brightness, auto hibernate, kernel schedulers etc.

All configuration files are very well commented, of course remember to add/enable init script of laptop-mode to a runlevel.

Advantages of Laptop Mode Tools:

• automaticaty detection AC or battery power source
• decreased hdd's usage (data read ahead and buffering data designed to write on a hdd)
• data loss protection
• you decide about each option, nothing is imposed on you
• default configuration is effective
• laptop-mode-tools manage everything, so you need no more programs

Disadvantages of Laptop Mode Tools:

• CPU frequency management, this is only function having better substitution. I recomend Cpufreqd which is more flexible

http://samwel.tk/laptop_mode/   -  Link to Laptop Mode Tools project