[ubuntu] Amazon videos stopped working in chrome (I did install HAL) works in firefox

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http://ubuntuforums.org – Hey guys I have amazon prime membership , and I watch amazon instant videos, on ubuntu 12.10 , a few months ago amazon instant videos didnt work and I installed "hal" and it worked fine in chrome. since last week it only works in firefox and not in chrome, I re-installed hal but still no help . the progress bar goes but it shows black screen video with no sound. my chrome version is Version 20.0.1132.57 my ubuntu 12.10 is 64 bit any idea? (Hardware)