Kubuntu: Mplayer fullscreen video tearing

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Problem

When I play a video fullscreen in mplayer, the top portion of the screen shows tearing, i.e. a horizontal bar misaligns. I created this image to show the problem, the tearing occurs at the red arrow:

mplayer_tearing_800x450.jpg

Environment

  • Kubuntu-14.04
  • KDELibs Version: 4.13.3
  • Qt Version: 4.8.6
  • mplayer-1.1-4.8
  • Integrated Graphics Chipset: Intel(R) HD Graphics 4400 (Xorg.log)
  • Haswell-ULT Integrated Graphics Controller, Intel Corporation, driver=i915 (lshw -C video)

Workaround

Press Alt+Shift+F12, or the shortcut key defined at: { System Settings | Desktop Effects | "Desktop effects can be toggled anytime using this shortcut:" }

Journal

20150124

http://askubuntu.com/questions/456355/have-tearing-no-vsync-in-movies-nvidia-proprietary-driver

It was advised to put the lines below in /etc/profile: 

export __GL_YIELD=USLEEP
export __GL_THREADED_OPTIMIZATIONS=1

but this doesn't fix it for me.

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