[PATCH v3] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges

[Mika Westerberg]

On Mon, Oct 21, 2019 at 03:02:23PM +0200, Karol Herbst wrote:
> > No, just block runtime PM from the device in nouveau driver.
> 
> but that's not what the patch does. It only skips the PCI PM reg
> write, but still let the ACPI method be invoked to put the device into
> D3cold

Oh, indeed it does. I did not realize that.

Which makes me wonder whether ACPI _OFF() expects the device to be in D0
for some reason.