Take the 2-minute tour ×  I tried to install FGLRX drivers on
Ubuntu 13.04, but that didn't work out.  I then went back to the
open source drivers (via update-manager) but I couldn't boot
into a graphical OS.  I got a black screen with a prompt to log
in.  I got in, launched lightdm manually, and reinstalled the
OSS drivers... and now I have them installed, and I even seem to
be using them (chrome://gpu reports that I am, and I can move
things around the screen).  But everything is screwed up - I
can't get Unity to launch, I'm still booting into the black
screen, and I can't seem to fix this.   edit: I removed fglrx
completely, and I now boot into a UI, but it's just a desktop
background. No Unity.  edit2: I can now launch Unity manually...
but it doesn't have any of my old settings, and doesn't have any
plugins etc. So that's still not working great.  edit3: I went
into CCSM and reenabled all of the plugins like Unity and gave
default settings. IDK what else but something broke Unity, I can
no longer launch