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Hardware:

Toshiba Satellite S855D
Procesor AMD A8-4500M APU with Radeon(tm) HD Graphics × 4 

Operating System:

Ubuntu 12.04 LTS

Problem:

When launching videos (.avi) the sound is heard but the video is not displayed, the mouse and keyboard do not respond, the only way to exit is shutting down the PC. This happens with the video player included in Ubuntu and with VLC media player.

Same problem happens when configuring webcam in skype, the strange thing is that I can watch videos in youtube and facebook. Also I can acces the camera and video via OpencV.

Attemped Solutions:

I changed from ATI/AMD propietary FGLRX graphics dirver (beta experimental) 
to the privative one post-launching. 

Any idea or solution?

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