install catalyst driver on ubuntu 14.04

Download the driver from here.
I am using HD 7970M. You can select your device driver from http://support.amd.com/en-us/download.

If you choose the ubuntu version, there will be three deb packages to download.

Here are the names of my downloaded files.
[1]fglrx_15.201-0ubuntu1_amd64_UB_14.01.deb
[2]fglrx-amdcccle_15.201-0ubuntu1_amd64_UB_14.01.deb
[3]fglrx-core_15.201-0ubuntu1_amd64_UB_14.01.deb
[4]fglrx-dev_15.201-0ubuntu1_amd64_UB_14.01.deb

Before installing the debian packages, run the following command to solve the dependency requirement.
$sudo dpkg --add-architecture i386
$sudo apt-get install lib32gcc1 libc6-i386 dkms
( option packages $sudo apt-get install debhelper dh-modaliases execstack dpkg-dev )

When you run into any depedency issues, try to run $sudo apt-get install -f
You may need to $sudo apt-get update at some point.

Then $sudo dpkg -i *.deb

I am using a laptop with hybrid graphics cards.
$sudo amdconfig –initial –adapter=all

Then reboot, login, $clinfo or $glrxinfo, to see the driver is installed or not.

If the program hangs or not correct drivers are found, don't panic, try the following steps.
(https://help.ubuntu.com/community/BinaryDriverHowto/AMD
http://askubuntu.com/questions/465778/gnome-ubuntu-14-04-aticonfig-no-supported-adapters-detected-ati-radeon-6770m)

sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.BAK
sudo apt-get purge fglrx*
reboot
sudo apt-get install fglrx
sudo apt-get install fglrx xvba-va-driver libva-glx1 libva-egl1 vainfo
sudo amdconfig --adapter=all --initial
reboot
if you are introduced with a black screen, don't panic.
ctrl + alt + f1
sudo amdconfig –initial –adapter=all
reboot
check $fglrxinfo
or
sudo apt-get install mesa-utils
glxheads