My screen are darkening every 20 or some minutes. It was originally xscreensaver installed, but nothing changed after I removed it. This behavior very annoying when I am trying to see some movie.

There is output of xset q:

Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  0    cycle:  0
DPMS (Energy Star):
  Standby: 7200    Suspend: 7200    Off: 14400
  DPMS is Disabled

I have tried to disable DMPS by xset -dpms but it looks like something reenables it time-to-time.


Solved by usage of XFCE's power managment GUI configurator

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Have a look at the output of xset q, it will tell you if DPMS is enabled, and the times to suspend.

You switch it off completely with xset -dpms, or set the times with `

xset dpms <standby_seconds> <suspend_seconds> <off_seconds>

You can also configure it in the ServerFlags section in your xorg.conf, see man xorg.conf.

Many player applications (e.g. mplayer) automatically disable dpms it while playing a movie.

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  • It doesn't help. Nor disabling DPMS, nor settings in VLC player. – ephemerr Jul 17 '17 at 7:00
  • Please edit question with output of xset q, the parts in Screen Saver and in DPMS. – dirkt Jul 17 '17 at 8:40

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