Using Work In Progress (6.0.17262.13121, 9/19/2017) build, no curves show when gpu tessellation is on. Even on new models I draw a curve and nothing shows up. This is unrelated to the monitor sleep cycle BUG that has been fixed.
What display adapter does your Options > OpenGL page show you’re using?
That should work just fine unless your drivers are old.
Run Windows Device Manager > Display adapters and see how old your drivers are.
If they are stale see if your laptop maker has updated drivers available for download.