I have a Lenova Y550 Laptop with dual boot 12.04 LTS and Windows 7. My graphics card is Nvidia Geforce 240M. In windows HD movies (2 GB to 4 GB) are playing so smooth and I didn't find any sluggishness till date, But in Ubuntu it is different. Video hangs and gets interrupted frequently and it is impossible to watch movies. I have installed Nvidia accelerated graphics driver(version current) which is the recommended one from Ubuntu.
What should I do to make things same as that of Windows ?