I'm absolutely new to Linux/ubuntu. I decided to give it a try after years of debate. I just installed ubuntu12.04 LTS. On initial set up graphics are bad however everything else works great (audio, wireless, etc). In settings I hit additional drivers and I get a huge list of updates to install which I do, then restart. then I do it again and get the drivers for graphics card and after that reboot, all I get is a black screen after a momentary purple screen. I don't know how to troubleshoot or enter "terminal" to edit stuff so I just keep reinstalling. SOS! Please help!