Messages in this thread | | | Date | Mon, 21 Oct 2019 17:08:52 +0300 | From | Mika Westerberg <> | Subject | Re: [PATCH v3] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges |
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On Mon, Oct 21, 2019 at 03:54:09PM +0200, Karol Herbst wrote: > > I really would like to provide you more information about such > > workaround but I'm not aware of any ;-) I have not seen any issues like > > this when D3cold is properly implemented in the platform. That's why > > I'm bit skeptical that this has anything to do with specific Intel PCIe > > ports. More likely it is some power sequence in the _ON/_OFF() methods > > that is run differently on Windows. > > yeah.. maybe. I really don't know what's the actual root cause. I just > know that with this workaround it works perfectly fine on my and some > other systems it was tested on. Do you know who would be best to > approach to get proper documentation about those methods and what are > the actual prerequisites of those methods?
Those should be documented in the ACPI spec. Chapter 7 should explain power resources and the device power methods in detail.
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