Hi Souvik, I've been trying to think what could possibly be wrong with your setup. The gpu you're using should work, the userspace code from master is known to work. The only thing I can figure is that your kernel may be too old. You might consider trying an updated version of ubuntu which will have a newer kernel. You might even be able to try Darxus' script in a live session provided you have enough RAM. I simcerely hope that you get it working so you can advance your goals. Cheers, Scott