** Description changed:

  I am running unity system compositor on my desktop in dual screen mode
  with Intel HD 2500 graphics.
  
  When I play video, even when it's halted and the media player window
- (vlc and mplayer) is on another work place, the screen flickers black.
+ (vlc and smplayer) is on another work place, the screen flickers black.
  
  I was able to find the following messages in /var/log/Xorg.0.log:
  [  8967.357] (II) Setting DPMS mode for output 1 to 0
  [  8967.884] (II) Setting DPMS mode for output 3 to 0
  [  8972.730] (II) Setting DPMS mode for output 1 to 0
  
  Watching the file with tail -f gives one or two new lines of these
  messages after each flicker.
  
  I experience this only on my desktop in dual screen mode, not on my
  laptop that also uses Intel graphics (HD 4000) and is currently running
  saucy.
+ 
+ Totem and mplayer run from terminal are not affected.

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https://bugs.launchpad.net/bugs/1238886

Title:
  Screen flickers black during video playback on Intel graphics in dual
  screen mode

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