Disable Nvidia in Lenovo Y470 Debian wheezy

　　1、add the apt-key as 'root' (! don't do this as 'sudo' )

$ su root
$ wget -O - http://suwako.nomanga.net/suwako.asc | apt-key add -

　　2、add the repository to source.list

$ sudo vim /etc/apt/source.list

# bumblebee
deb http://suwako.nomanga.net/debian sid main contrib
deb-src http://suwako.nomanga.net/debian sid main

　　3、install bumblebee

$ sudo apt-get update 
$ apt-get install bumblebee bumblebee-nvidia

　　TIPS: 

If you are on amd64 architecture and want to run 32 bit applications (e.g. Wine), you need to install virtualgl-libs:i386 package. Blob users should install libgl1-nvidia-glx:i386 package also. But due to bug #640499 it's not possible now. You can use packages from here as a workaround.

　　check the official-wiki website:

http://suwako.nomanga.net/

　　or just enter:

sudo apt-get install virtualgl-libs:i386 libgl1-mesa-glx:i386 libc6:i386

　　4、add user to bumblebee group

$ adduser $(USER) bumblebee

　　5、download bbswitch

$ git clone git://github.com/Bumblebee-Project/bbswitch.git -b hack-lenovo 
$ cd bbsswitch
$ sudo mkdir /usr/src/acpi-handle-hack-0.0.1

　　6、copy the files to acpi-handle-hack-0.0.1

$ sudo cp Makefile acpi-handle-hack.c /usr/src/acpi-handle-hack-0.0.1 
$ sudo cp dkms/acpi-handle-hack.conf /usr/src/acpi-handle-hack-0.0.1/dkms.conf 
$ sudo dkms add acpi-handle-hack/0.0.1 
$ sudo dkms build acpi-handle-hack/0.0.1 
$ sudo dkms install acpi-handle-hack/0.0.1 

　　7、reboot

$ echo acpi-handle-hack | sudo tee -a /etc/modules 
$ sudo update-initramfs -u 
$ sudo shutdown -r now

　　8、check the nvidia driver after reboot

$ lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 0df6 (rev ff)

　　the "rev ff" means nvidia was turned off.