But if you have Optimus working at all, you dumped a couple of weekends into it, right? The dual-graphics auto-switching thing (which I had on my old W530 and n

But if you have Optimus working at all, you dumped a couple of weekends into it, right? The dual-graphics auto-switching thing (which I had on my old W530 and now again on my P50) is jank city even with properly tuned "bumblebee" software installed, and proprietary stuff is to blame for that.