So, I've tried the bumblebee "hack" listed HERE:https://github.com/Bumblebee-Project/bbswitch/tree/hack-lenovo

I copied every line below into the terminal, is that what I was supposed to do? I'm a Linux noob.

git clone http://github.com/Bumblebee-Project/bbswitch.git -b hack-lenovo
cd bbswitch
mkdir /usr/src/acpi-handle-hack-0.0.1
cp Makefile acpi-handle-hack.c /usr/src/acpi-handle-hack-0.0.1
cp dkms/acpi-handle-hack.conf /usr/src/acpi-handle-hack-0.0.1/dkms.conf
dkms add acpi-handle-hack/0.0.1
dkms build acpi-handle-hack/0.0.1
dkms install acpi-handle-hack/0.0.1
echo acpi-handle-hack | sudo tee -a /etc/modules
sudo update-initramfs -u

(had to use http:// instead of git://, in my uni)

It doesn't change anything, I get

joe@ubuntu:~$ optirun glxspheres
[ 4447.830749] [ERROR]Cannot access secondary GPU - error: Could not load GPU driver

[ 4447.830844] [ERROR]Aborting because fallback start is disabled.