My dad has an HP computer with Mint 17 x64 (E6300, 2GB RAM, Radeon HD 5450 that I just added). It was there even before I added the 5450, with just the Intel GMA 3000 graphics. Long story short, I cannot get rid of the severe screen tearing that seems to be common. It is evident in every video from Amazon Prime to Youtube... I have tried a few things, such as adding lines of code to the etc/environment file. No luck there. I tried switching to fglrx from xorg. I tried installing the newest driver right from AMDs website, ran the automated installer through the CLI...when it boots back up Cinnamon crashes and puts the desktop into "fallback mode" and the resolution gets stuck at 1024x768 so I had to uninstall it. Anyone have any ideas?