hald-addon-hid-ups hald-addon-acpi hald-addon-pmu org.freedesktop.Hal.Device.SystemPowerManagement Suspend i num_seconds_to_sleep hal-system-power-suspend Hibernate hal-system-power-hibernate Shutdown hal-system-power-shutdown Reboot hal-system-power-reboot SetPowerSave b enable_power_save hal-system-power-set-power-save