I'm using Ubuntu 14.04 and I've just updated from kernel 3.16 to 3.19.0-30-generic. The thing is that this kernel uses CPU graphic card, and this is what I wanted, the problem is that when I suspend Ubuntu it switches to GPU (NVIDIA GTX 850M) and when I turn it on again Ubuntu freezes. I'm using X.OrgXserver-Nouveau display driver from xserver-xorg-video-nouveau(open source). But on system details says I'm using Intel® Haswell Mobile. This also happends when I use a tty. It always happends when Ubuntu uses de GPU, because my computer has an indicator light that tells you wich graphic card you are using. When I suspend or chanche to a tty it becames orange (that means that it is using the GTX 850M) and after that is when it freezes.
My computer is a MSI GE60 2PC: Intel® Core™ i7-4720HQ CPU @ 2.60GHz × 8 And I'm using Ubuntu with CairoDock+Gnome effects
Thanks in advanced