an update to my previous post. the 435.xx drivers seem to break vsync on prime setups if used with vulkan.
prime+vulkan+435.xx= 5 seconds frozen, 2 seconds not frozen in a repetitive loop.
the new render offload method on skylake cpu's results in tearing like you wouldnt believe.
olli i get 4-5 hours battery with the intel gpu and only less than 2 hours when the nvidia gpu is turned on.
a good switchable graphics setup is much more stable and performs better. render offload could replace bumblebee, but that's hardly a high bar to set given it's terrible performance and problems that come along with it.