Looking for logging into the Ubuntu 16.04 Bumblebee Lock site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Ubuntu 16.04 Bumblebee Lock site. After that you can login as usual with your login credentials.
https://github.com/Bumblebee-Project/Bumblebee/issues/808
https://askubuntu.com/questions/269661/black-screen-on-boot-nvidia-optimus-card
https://ubuntuforums.org/showthread.php?t=2292628
https://devtalk.nvidia.com/default/topic/1032482/linux/optimus-on-ubuntu-18-04-is-a-step-backwards-but-i-found-the-first-good-solution/
https://www.linuxquestions.org/questions/ubuntu-63/i-can%27t-login-to-ubuntu-desktop-after-installing-bumblebee-ubuntu-14-04-a-4175507226/
https://www.maketecheasier.com/manage-nvidia-optimus-chipsets-ubuntu-bumblebee/
https://wiki.archlinux.org/index.php/bumblebee
https://xipherzero.com/ubuntu-optimus-configuration/
https://wiki.ubuntu.com/Bumblebee
http://www.webupd8.org/2016/08/how-to-install-and-configure-bumblebee.html
https://bugs.launchpad.net/bugs/1615734
https://unix.stackexchange.com/questions/242455/how-do-you-successfully-install-or-uninstall-nvidia-bumblebee-on-ubuntu-werewolf
https://www.reddit.com/r/Ubuntu/comments/7emvak/q_bumblebee_on_1710_and_cuda/