Comment 41 for bug 1431753

Please stop this banter, clogging my emails up.

I sorted my PCs and laptops out with the following fix for now. Not had ANY issues since doing below:

Card driver
http://www.nvidia.co.uk/Download/index.aspx?lang=en-uk

nVidia

Boot and after GRUB…
Control+ALT+F1
Sudo su
sudo update-pciids
sudo lspci -v -s 01:00.0

Sudo service lightdm stop (stopping lightdm)
sudo apt-get clean && apt-get autoclean && apt-get autoremove (a little cleaning)
sudo apt-get update && apt-get install –f (update source and fix)
sudo apt-get purge libvdpau-va-gl1 bumblebee* nvidia*
OR
dpkg -l | grep nvidia
 lists everything installed for nvidia
then remove everything except
  nvidia-cg-toolkit (if it or equivellent exists)
  nvidia-common
sudo apt-get purge nvidia-xxxx (where xxxx is anything from the list)

sudo apt-get autoremove
sudo dpkg-reconfigure nvidia-common (should return a message does not exist)
sudo apt-get install nvidia-352 nvidia-settings nvidia-prime nvidia-current nvidia-cg-toolkit nvidia-common
OR
Sudo apt-get install --reinstall nvidia-xxx-updates-uvm (install nvidia-xxx where xxx is driver version: 304, 331, 340, 349, 352 or current)

sudo apt-get install xserver-xorg-video-nouveau
sudo apt-get install linux-headers-generic
sudo apt-get clean && apt-get autoclean && apt-get autoremove
sudo apt-get apt-get upgrade && update && apt-get install –f
sudo update-alternatives --config x86_64-linux-gnu_gl_conf
sudo ldconfig -n
sudo update-initramfs -u
sudo shutdown –r now

Let the devs get on and do perm fix in the meantime.