Originally Posted by
staticn0de
Hi there,
Can you press CTRL + ALT + F1 and reach a terminal?
Is it blank screen or do you have a blinking cursor?
That is the typical symptom for if the laptop was not restarted after installing the NVIDIA drivers (after stopping gdm3) or x-config was run. I say this because you should not have been able to install CUDA without a restart and you have said you installed everything up to pyrit and then could not restart without a blank screen.
If you can reach terminal, run
cd ~
./NVIDIA*.run --uninstall
and then apt-get purge nvidia* bumblebee* primus*
and restart