Ok, so answering myself here, but for the benefit of those who also trip over this issue; it is due to the bbswitch system of an optimus laptop.
What I did to solve it was reinstall as per the post here:
Ok, so answering myself here, but for the benefit of those who also trip over this issue; it is due to the bbswitch system of an optimus laptop.
What I did to solve it was reinstall as per the post here: