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What is the relationship between the activity timer time-outs and the time-out choices I see in the Power control panel applet?

April 26, 2017activity applet choices CONTROL panel power relationship time-out time-outs timer

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What is the relationship between the activity timer time-outs and the time-out choices I see in the Power control panel applet?

2 Answers

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The activity timer time-outs indicate how long the Power Manager should wait before deciding that a particular activity source is inactive. This causes an inactivity event to become signaled. The control panel applet determines how long the inactivity event must remain signaled (without the corresponding activity event becoming signaled) before the Power Manager will initiate a system power state transition. Generally, activity timer time-outs should be small relative to the system power state time-outs, but large relative to the expected activity interval. For example, the system state time-out might be measured in minutes and the user activity timer might be 10 seconds. This prevents frequent activity timer state transitions during normal operation, but the user might actually be doing nothing for 10 seconds before the system “notices”. As a result, activity timers should be considered “coarse grained.

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The activity timer time-outs indicate how long the Power Manager should wait before deciding that a particular activity source is inactive. This causes an inactivity event to become signaled. The control panel applet determines how long the inactivity event must remain signaled (without the corresponding activity event becoming signaled) before the Power Manager will initiate a system power state transition. Generally, activity timer time-outs should be small relative to the system power state time-outs, but large relative to the expected activity interval. For example, the system state time-out might be measured in minutes and the user activity timer might be 10 seconds. This prevents frequent activity timer state transitions during normal operation, but the user might actually be doing nothing for 10 seconds before the system “notices”.