Comment 6 for bug 633593

I am a bit of a newbie so I'm not sure when to put the i915.modeset=1 - can anyone help?

You can test it by booting up and at the first boot manager Grub screen enter:
e
then go down to the line that ends with quiet splash and add
i915.modeset=1
then do Ctrl-X

If it works successfully, then in Applications Terminal do
sudo gedit /etc/default/grub
enter your password
at the end of the line that ends quiet splash insert
i915.modeset=1
save & quit
sudo update-grub
which makes an new boot manager list which should include the i915.modeset=1.