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[Launchpad Bug Tracker <1238886@xxxxxxxxxxxxxxxxxx>]

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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 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.

** Affects: mir
     Importance: Medium
     Assignee: Robert Carr (robertcarr)
         Status: Confirmed

** Affects: unity-system-compositor
     Importance: Medium
         Status: Confirmed

** Affects: xorg-server (Ubuntu)
     Importance: Medium
     Assignee: Robert Carr (robertcarr)
         Status: Confirmed

** Affects: unity-system-compositor (Ubuntu)
     Importance: Medium
         Status: Confirmed


** Tags: pm xmir
-- 
[xmir] Screen flickers black during video playback on Intel graphics in dual screen mode (DPMS mode changes constantly)
https://bugs.launchpad.net/bugs/1238886
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