when running "desktop-effects" in terminal i get
gnome-window-decorator: Screen 0 on display ":0.0" already has a decoration manager; try using the --replace option to replace the current decoration manager.
compiz: GLX_EXT_texture_from_pixmap is missing
compiz: Failed to manage screen: 0
compiz: No managable screens found on display :0.0
i have nvidia drivers installed and the system is up to date!