First off, sorry if this is not the most suitable forum to post this question.
I downloaded a Raspbian "jessie" image to run on Linux with qemu. I'm chiefly interested in Mathematica and raspbian-jessie comes with one. The image loads OK and everything seems to be fine but Mathematica asks for an activation key when it should work out of the box (exactly as raspbian-wheezy's bundled Mathematica copy does). Someone suggested me to try:
sudo usermod -a -G video pi
and restart X, what I did, but it didn't work. The activation key input windows insists in popping up. 'pi' is the username of the Raspbian's session (which I confirmed by running 'whoami')
What should I try? Any suggestions?
I'm running Ubuntu 16.04-64 bit and the image 2017-04-10-raspbian-jessie.img
PS: Before I'm misunderstood (as I've recently been) I must say that I'm not trying to crack Mathematica, since I truly believe it's free when it comes bundled with Raspbian.