Comment 161 for bug 1803179

Laptops with Skylake SoC and later shouldn't need bbswitch. PCIe port PM will disable the power of the card.
After nvidia.ko gets unloaded, make sure "power/control" is "auto" for its video (e.g. 01:00.0) and audio (e.g. 01:00.1) functions and its upstream bridge (use lspci -t to check).

In addition to that, these two commits are also required for mainline kernel users:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=52525b7a3cf82adec5c6cf0ecbd23ff228badc94
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=bacd861452d2be86a4df341b12e32db7dac8021e