1. Open a terminal and become root: [sourcecode]su[/sourcecode] 2. While Compiz Fusion is available in the main repository, the Nvidia driver is not - it comes from the non-free repository; that's why we must open /etc/apt/sources.list... [sourcecode]gedit /etc/apt/sources.list[/sourcecode] ... and append the string contrib non-free to all repositories: [sourcecode language="bash"] deb http://ftp.de.debian.org/debian/ squeeze main contrib non-free deb-src http://ftp.de.debian.org/debian/ squeeze main contrib non-free deb http://security.debian.org/ squeeze/updates main contrib non-free deb-src http://security.debian.org/ squeeze/updates main contrib non-free deb http://ftp.de.debian.org/debian/ squeeze-updates main contrib non-free deb-src http://ftp.de.debian.org/debian/ squeeze-updates main contrib non-free [/sourcecode] 3. Update the package database afterwards: [sourcecode language="bash"] apt-get update [/sourcecode] 4. Then install Compiz Fusion and the Nvidia driver as follows: [sourcecode language="bash"] apt-get install compiz compizconfig-settings-manager compiz-fusion-plugins-main compiz-gnome compiz-gtk fusion-icon compiz-fusion-plugins-extra compiz-fusion-plugins-unsupported nvidia-glx nvidia-xconfig nvidia-kernel-dkms nvidia-settings [/sourcecode] 5. Reboot the system afterwards. 6. After the system has come up again, become root again 7. check if the Nvidia kernel module got loaded with lsmod | grep -i nvidia the success output will be like this: [sourcecode] root@debian:/home/emka# lsmod | grep -i nvidia nvidia 10670090 0 i2c_core 15819 6 nouveau,drm_kms_helper,drm,i2c_algo_bit,nvidia,i2c_nforce2 root@debian:/home/emka# [/sourcecode] Happy strugling guys!