IBM MICRO TOWER 2169 Hardware Maintenance Manual

Contents

54Power Management Setup OptionThis option displays items that let you control the system powermanagement. Operating systems take care of much of thepower management. This mainboard supports ACPI (advancedconfiguration and power interface). The system has variouspower saving modes including powering down the hard disk,turning off the video, suspending to RAM, and a software powerdown that allows the system to be automatically resumed bycertain events.Power Management TimeoutsThe power-saving modes can be controlled by timeouts. If thesystem is inactive for a time, the timeouts begin counting. If theinactivity continues so that the timeout period elapses, thesystem enters a power-saving mode. If any item in the list ofReload Global Timer Events is Enabled, then any activity onthat item will reset the timeout counters to zero.Wake Up CallsIf the system is suspended, or has been powered down bysoftware, it can be resumed by a wake up call that is generatedby incoming traffic to a modem, a LAN card, a PCI card, or afixed alarm on the system realtime clock.ACPI Suspend Type Default: S1 (POS)Use this item to define how your system suspends. In thedefault, S1(POS), the suspend mode is equivalent to a softwarepower down. If you select S3 (STR), the suspend mode is asuspend to RAM – the system shuts down with the exception ofa refresh current to the system memory.Power Management Default: DefineThis item acts like a master switch for the power-saving modesand hard disk timeouts. If this item is set to Max Saving, power-saving modes occur after a short timeout. If this item is set toMin Saving, power-saving modes occur after a longer timeout. Ifthe item is set to User Define, you can insert your own timeoutsfor the power-saving modes.Video Off Method Default: DPMSThis item defines how the video is powered down to savepower. As a default, this is set to DPMS (display powermanagement software).Video Off In Suspend Default: YesThis option defines if the video is powered down when thesystem is put into suspend mode.