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Relatively noob here. I'm having a blast with Ubuntu, successfully playing all kinds of steam games, no complaints until Firewatch came out. It was recommended to me to install AMD Catalyst Control Centre. I tried doing this several ways (followed these guidelines: What is the correct way to install proprietary ATI Catalyst Video Drivers (fglrx) directly from AMD?

and also once: https://www.youtube.com/watch?v=Ka5gBMlo-zo)

Unfortunately, after I install the fglrx driver, and reboot, I only get a black screen, and cannot revert my installation (as I don't see anything), and I already reinstalled 14.04 twice. As you can see, I'm obviously not an expert, but I would like to be able to try out something, without messing up everything, preventing a necessary reinstall of everything. Is there a safe 'sandbox' mode to try things, or how can i reboot to a non-graphical interface (command line only) and revert wrong installations? Alternatively, any tips on how to safely install AMD Catalyst Control Centre?

Thanks so much!!

Specs: Ubuntu 14.04 LTS Memory 11.7 GiB Intel Core 17-2670QM CPU@ 2.20GHz x8 Graphics: AMD Radeon HD 6850M OS: 64-bit DisK 120 GB

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You should be able to access the command line by pressing CTRL+ALT+F6. (or anything between F1 & F8) they are all TTY's, the desktop usually runs on TTY7 (CTRL+ALT+F7). do sudo apt-get remove for anything you installed before reboot. and cross your fingers.