[Jaunty SRU] LP#349992 Allow to disable GEM on i915 chipset

[Ike Panhc]

Stefan Bader wrote:
> So how is the stance on this. I would think it would qualify as a way to
> get around the performance problems and as the default is the same as
> before it would not change behaviour. ACK from me.

I will keep on watching the thread of this. Lots of testing result need to
track. I think I shall have a talk with Bryce. It seems he is expert.