On Mon, 9 Dec 2019 at 21:39, Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote: > > On Mon, Dec 9, 2019 at 12:17 PM Karol Herbst <kherbst@xxxxxxxxxx> wrote: > > > > anybody any other ideas? > > Not yet, but I'm trying to collect some more information. > > > It seems that both patches don't really fix > > the issue and I have no idea left on my side to try out. The only > > thing left I could do to further investigate would be to reverse > > engineer the Nvidia driver as they support runpm on Turing+ GPUs now, > > but I've heard users having similar issues to the one Lyude told us > > about... and I couldn't verify that the patches help there either in a > > reliable way. > > It looks like the newer (8+) versions of Windows expect the GPU driver > to prepare the GPU for power removal in some specific way and the > latter fails if the GPU has not been prepared as expected. > > Because testing indicates that the Windows 7 path in the platform > firmware works, it may be worth trying to do what it does to the PCIe > link before invoking the _OFF method for the power resource > controlling the GPU power. > Remember the pre Win8 path required calling a DSM method to actually power the card down, I think by the time we reach these methods in those cases the card is already gone. Dave.
