ACPI EC Fail – Evaluating _REG Object of EC Device

I have the same Nvidia GTX 950 M graphics card and I made it work following:

sudo apt-get purge nvidia*  
sudo reboot

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-361 
sudo reboot  

I didn't specified any such params and I had just blacklisted nouveau and nothing else. My laptop is working all fine. I upgraded to kernel 4.2.5 for wifi issues.

Please refer to this thread for more info.

So this could be the issue. Please setup the nomodeset before the installer starts doing anything. Adding the nomodeset parameter instructs the kernel to not load video drivers and use BIOS modes instead until X is loaded. For more details refer to this thread

Once the install is done you have to follow these steps(mine is also GTX 960M) In the terminal (press Ctrl+Alt+T to open it or Ctrl+Alt+F1 till F6) run this

sudo apt-get purge nvidia*  
sudo reboot 

This will remove any installed nvidia drivers.

Then install the new drivers

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-361
sudo reboot