fglrx-driver software package provides non-free ATI/AMD RadeonHD display driver, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fglrx-driver
fglrx-driver is installed in your system.
Make ensure the fglrx-driver package were installed using the commands given below,
$ sudo dpkg-query -l | grep fglrx-driver *
You will get with fglrx-driver package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | X Window System software |
| Package | fglrx-driver |
| Version | 1:15.9-4~deb8u2 |
| Description | non-free ATI/AMD RadeonHD display driver |
| Sub Section | x11 |