This question seems poor but i really facing this problem (I am new to ubuntu). I install Ubuntu 12.04 on my HP laptop. I also upgraded all its packages using sudo apt-get update && sudo apt-get upgrade. But when I play any video file through media player (default and smplayer), i can only hear audio but no video is seen, screen becomes blanks. All types of video file can be played but only audio can be heard, no video.

  • Do you have a graphics card? – muru Aug 31 '14 at 10:11

This sounds like a codec problem.

Try this command:

sudo apt-get install ubuntu-restricted-extras

Also, you should try a better video player. I recommend VLC.

sudo apt-get install vlc

Have fun!

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