I have had a problem with lag on Ubuntu 12.04 before after upgrading from Ubuntu 11. After doing a fresh install of ubuntu 12.10, everything has been working fine and fast until now. I was really excited to hear that Steam has finally came to linux, but it would not run TF2 as it gave me a black screen. One of my friends on steam sarted a voice chat call, the second I clicked "Answer", my entire computer dropped to 1 FPS and I have no idea what steam did to my computer. Help? I am willing to provide any information people request.