I have a "inspiron 1525"and am running 11.10 version of Ubuntu, I noticed that when scrolling I can see a lag and also when playing back HD content it will freeze the video for a few seconds and then resume, none of those happened on winVista when I had it installed, now I do prefer Ubuntu and would like to fix this rather than go back to windows. the chip is an "intel corporation mobile gm965 gl960 integrated graphics controller" as stated by "lspci" I don't know much about dealing with installing drivers that's why I'm asking for help and would like to be commands that I can put on terminal, rather than go here and then there and then look for this or that. I think I'll get lost in the middle but terminal I can follow. thanks for your help.