I accidently remove the graphics driver (I did something like
apt-get remove --purge fglrx* and other things, I don't really remember) and now my computer boot to a console login page.
Now without GUI I cannot connect to wireless internet and so cannot install anything.
Can I revert to the initial graphics driver (and configuration)? Maybe with an installation CD? I have Ubuntu 13.10.
sudo-apt-get install --reinstall fglrx, it did install, but when I tried
fglrxinfo, it gives
Error: unable to open display (null)