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# install ubuntu repo native drivers
sudo apt-get install fglrx-updates

# check temp
aticonfig --adapter=0 --od-gettemperature

# installing directly from amd
# install dependencies
sudo apt-get install dh-modaliases dkms execstack lib32gcc1 libc6-i386

# build deb files
unzip amd-catalyst-omega-14.12-linux-run-installers.zip
cd fglrx-14.501.1003
sudo sh amd-driver-installer-14.501.1003-x86.x86_64.run --buildpkg Ubuntu/trusty

# installation
sudo dpkg -i fglrx*.deb
sudo aticonfig --initial

# check driver version
fglrxinfo

# remove fglrx driver
sudo apt-get remove --purge fglrx fglrx-amdcccle fglrx-core fglrx-dev