I have had problems installing the graphics card. I've tried several forums and have not yet succeeded.
However I found the bumblebee could install everything but the program does not start.
this is the link to follow to install:
and when I optirun glxgears is giving this error:
[ERROR] The Bumblebee daemon has not been started yet or the socket path / var / run / bumblebee.socket was incorrect.
[ERROR] Could not connect to daemon bumblebee - is it running?
have to walk almost one month to install the graphics, and I have achieved ... Please help an