I'M installed The BT5 on my hard disk,now i want to install NVIDIA driver.
first i use apt-get install nvidia-driver command to intsall,the error is :not find the packges...
then i download the driver from www.nvidia.com and install it.but the error is:
Unable to find the kernel source tree for the currently running kernel. Please make sure you have installed the kernel source files for your kernel and that they are properly configured; on Red Hat Linux systems, for example, be sure you have the 'kernel-source' or 'kernel-devel' RPM installed. If you know the correct kernel source files are installed, you may specify the kernel source path with the '--kernel-source-path' command line option.
my notebooke is ASUS A53XI241SV there are two Graphics.Intel and NVIDIA GT540M.


