What exactly does the xfce4-power-manager if I press the button for presentation mode?

Is it called X function? Or what else?

Any ideas?

2 Answers 2


It does two things, both intended to keep automatic features from messing up a presentation where you don't touch the machine for a long time (e.g. a teacher showing a video to a class):

  • Turns off DPMS (Display Power Management Signaling) so your screen won't blank or sleep
  • Prevents screensaver mode from activating

It prevents your system from suspending or hibernating.

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