After installing Ubuntu on a machine with a Radeon 6530D graphics card, the machine will reboot to a black screen because of problems with the default graphics driver.
How do I install the proprietary ATI driver?
This is how I installed the ATI driver for Ubuntu 13.10 and 14.04.
Reboot. When the black screen appears, press some of the cursor keys and a box will appear with a message about an X server error.
Press CTRL + ALT + F1 to get a tty terminal.
Log in as root. The password is your own password that you set during installation.
Remove the Xorg drivers.
apt-get remove --purge xserver-xorg-video-ati xserver-xorg-video-radeon
Repeat steps 1-3.
apt-get install fglrx-amdcccle-updates
You should now have a working desktop. You will find the AMD Catalyst Control Centre in the menu, although I have never found a need to change any of the settings.