Comment # 14
on bug 98505
from Peter Wu
(In reply to Alex Deucher from comment #12) [..] > > Lowering the minumum from 2015 to 2014 should work for nouveau: > > https://lists.freedesktop.org/archives/nouveau/2016-July/025619.html > > > > For further clarify on your research, the current hybrid graphics spec > requires no connectors on the dGPU and hence no audio devices. For devices > with connectors on the dGPU, they should use the older vendor specific > methods and PR3 should not be exposed. The list was mentioned because of the BIOS dates and whether _PR3 is used. The Windows 8 requirements state that the discrete GPU is render-only[0], but the Win10 reqs have no such requirement[1]. (Are these the same specs you had in mind? If not, could you share the right one?) On my new hybrid nvidia laptop, there are actually DP/HDMI ports to the dGPU (HDMI with audio). [0]: https://msdn.microsoft.com/en-us/library/windows/hardware/dn265510(v=vs.85).aspx [1]: https://msdn.microsoft.com/en-us/windows/hardware/commercialize/design/compatibility/systems#systemfundamentalsgraphicshybridgraphicsmultigpu > > You can try to ask Mika, see v4.7-rc2-3-g9d26d3a. Maybe the presence of a > > power resource (_PR3 or flags.power_resources) can be used as a hint whether > > to enable port PM. > > Yes, the presence of _PR3 would be a great way to determine when to enable > it. Have you been working on this or should I have a look?
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