There seems to be lot of problems with proprietary drivers in Raring. It is a fresh release and not everything is always working as it should.
Make sure that you don't have proprietary and open source drivers installed at the same time. When you try different drivers, always keep track of which one is loaded. To do that you can use this command:
$ lspci -nnk | grep -iA3 vga
If you get into situation where something crashes and you will not be able to fix things by using graphical user interface you can still get to command line. Firstly you can try pressing Ctrl+Alt+F<1-6>( chose number between 1 and 6). Another option is to enter “recovery mode” at boot that also gives you access to command line. So maybe you don't have reinstall entire OS.
You get a list of installed packages with this:
$ dpkg --get-selections
When you remove a packages with apt-get use “purge”:
$ sudo apt-get purge <package-name>
Open source driver packages:
To install a package use good old:
$ sudo apt-get install <package-name>
If you really want the benefits of the proprietary driver then you could also download proprietary drivers directly from amd support site.
Inside the zip-file there is a run-installer. I suggest you create deb-file from that (more details and tips here and here)as then the driver is easier to remove if it doesn't work.
If you have to do it all from command line then these are the steps:
Download the driver:
$ wget http://www2.ati.com/drivers/linux/amd-catalyst-13.4-linux-x86.x86_64.zip
Unzip the driver:
$ unzip amd-catalyst-13.4-linux-x86.x86_64.zip
Make the file executable:
$ chmod +x amd-catalyst-13.4-linux-x86.x86_64.run
Create deb-file from the run-installer:
$ sudo ./amd-catalyst-13.4-linux-x86.x86_64.run --buildpkg Ubuntu/raring
This might give you an error as you might lack necessary packages. According to this site at least Precise needed these packages to be installed.
$ sudo apt-get install dh-make dh-modaliases execstack
Install the deb file (replace * sign with the real ending – to check the correct file name you can use
ls -l command):
$ sudo dpkg -i fglrx*.deb
If that also doesn't work I guess, you are stuck with open source drivers until problems get fixed. Also than when something is supposed to work but doesn't it is a bug and these only get fixed if bugs are reported. On reporting bugs see this. Always check that the bug has not been reported already but even if it has you should still click that you are been affected by the bug as it raises its importance.