By default, the power manager performs various actions when the system is inactive for a given period of time:
There are different ways to define "activity":
User activity and video activity block all of the above actions from being performed. The screen will still dim and be turned off while audio is being played, but the system will not suspend. Once activity ceases, the inactivity timer starts again.
When the suspend delay is reached while no user is logged in and the system is on battery power, the system will shut down instead of suspending.
As of M41, if the lock screen is displayed, the screen will be dimmed after just 30 seconds of inactivity and turned off after 40 seconds as described in this bug.
Several events can result in the above delays being lengthened (specifically, the screen-dimming delay is doubled and the other delays' distances from the dimming delay are maintained; for example, on battery, the delays are changed to 10/11/16 minutes):
If the "Require password to wake from sleep" setting is enabled, the screen will be locked ten seconds after the screen is turned off due to inactivity (in addition to being locked immediately before the system suspends when the lid is closed).
The above delays and actions can be configured by Chrome and are sent to the power manager as
On a running system,