Relate Issues (and Possible Solution) 1

As  CUDA 5.0 supports separable compilation, then I tried to upgrade it. However, it crashes. After i looked into the error log, I found that NVIDIA may not support CUDA 5.0, or the current working dirve does not support CUDA 5.0 well. Also, there is another option that, CUDA 4.2 may be good to upgrade. 
After I did all the work that I did to set up the whole thing, there is error during run-time. So, I compile all the codes again, at this time it showed error message during compile time ( Device busy.). I searched the Internet, did not find any useful information about it. I can only assume that,  the GPU I am using, NVIDIA 8200M does not support it. 
There is nothing I can do but cange the version back to 4.0- or even 3.1.

Also, there is another issue, that when I choose another version of Linux kernel, such as 3.0.0.30, and 3.0.0.31, it failed to load ecryptfs module. 

sudo modprobe ecryptfs is fine.
However, the code can still not complete their work.
The only thing I can find to make the code run further is to create a new private directory under usr.