Occurs in single screen mode too, VLC paused in background (not
minimized):

[  6459.325] (II) Setting DPMS mode for output 3 to 0
[  6470.156] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6490.320] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6493.461] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6504.247] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6505.689] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6509.329] (II) Setting DPMS mode for output 3 to 0
[  6510.673] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6521.371] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6524.928] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6526.838] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6539.283] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6544.117] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6559.333] (II) Setting DPMS mode for output 3 to 0
[  6561.626] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6575.201] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6601.265] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6609.337] (II) Setting DPMS mode for output 3 to 0
[  6617.500] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6618.665] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6619.855] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6645.329] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6652.960] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6653.058] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6655.321] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6655.583] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6655.751] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6659.339] (II) Setting DPMS mode for output 3 to 0
[  6662.282] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6672.425] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm
[  6686.041] (II) XKB: reuse xkmfile 
/var/lib/xkb/server-BB7BCED50A7832028D589D675FDFD0E4D9C55FF0.xkm

My software:
 Ubuntu 13.10\XMir (2:1.14.3-3ubuntu2)

My hardware:
Monitor is connected over HDMI
CPU:
 Intel(R) Core(TM) i5-3450S CPU
# lshw -c video
  *-display               
       description: VGA compatible controller
       product: Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:42 memory:f7800000-f7bfffff memory:e0000000-efffffff 
ioport:f000(size=64)

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

Title:
  Screen flickers black during video playback on Intel graphics in dual
  screen mode (DPMS mode changes constantly)

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