[lubuntu] Choppy streaming videos...

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http://ubuntuforums.org – I know that a bunch of these threads exist, but i have not been able to solve the problem on my laptop. Any type of streaming video be it youtube, linux, facebook, the video is choppy at full screen. I have dual-boot and these videos at full screen play perfectly fine on Windows XP. I'm new to Linux, have a windows 8 computer and a mac. This laptop is old and is server/print server/ plus mini media center for my TV in the bedroom. Using lubuntu 12.04 LXDE (older laptop that doesn't support PAE) Laptop is the Sony VGN-A190 Centrino 1.7 GHZ 512MB DDR RAM (soon to be 1.25 DDR) 160 GB HDD ATI M (Hardware)