When the available battery power becomes very low, it can alert all users on the system using several methods. Most uses of this daemon will use the proxy command to support power conservation activities. Normally sets system-wide power policy, such as IDE hard drive standby times, to account for whether battery power is in use. Normally undoes any policy settings done when the daemon started. Invoked when the APM driver reports that system suspension has been initiated.
Most laptops can stay suspended, using battery power alone, for several days.
Invoked when the APM driver reports that system standby has been initiated. Most laptops can't stay in standby mode for even a day, if they must rely on battery power. Normally, nothing needs to be done beyond what the BIOS itself will do. Some change in the power management capabilities of the system was reported. It may have been caused by operation of some setup utility, or by the arrival or removal of some devices.