i was trying to play an MP4 file. it is strange indeed as after my first install of raspbian it was working, as i am new i was trying some things out. tThen on another install i had the problem i stated, my system got borked when i was trying to sudo halt on a black screen which was failing to work and i pulled the plug. no worries i thought now i can reinstall and this will fix the problem. fresh install same problem! so looks like i am stuck this way.