fglrx-install

Detected a previous installation, /usr/share/ati/amd-uninstall.sh
Installation with force option.
Check if system has the tools required for installation.
fglrx installation requires that the system have kernel headers.  /lib/modules/3.2.0-4-amd64/build/include/linux/version.h cannot be found on this system.
fglrx installation is being forced. Installation will proceed without the required tools on the system.
Uninstalling any previously installed drivers.
Forcing uninstall of AMD Catalyst(TM) Proprietary Driver.
No integrity verification is done.
restore of system environment completed
Uninstall fglrx driver complete.
For detailed log of uninstall, please see /etc/ati/fglrx-uninstall.log
System must be rebooted to avoid system instability and potential data loss.
/usr/share/ati/amd-uninstall.sh completed with 0
[Message] Kernel Module : Trying to install a precompiled kernel module.
[Message] Kernel Module : Precompiled kernel module version mismatched.
[Error] Kernel Module : Kernel module build environment not found - please consult readme.
[Reboot] Kernel Module : update-initramfs