Installing AMD Radeon driver on Debian Jessie

1. Edit /etc/apt/sources.list
   deb http://httpredir.debian.org/debian/ jessie main contrib non-free
2. Install these software
   

   # aptitude update
   # aptitude -r install linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') fglrx-driver

3. Run initial configuration
   

   # aticonfig --initial

https://wiki.debian.org/ATIProprietary#AMD_Catalyst_14.9