<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [Topaz] Regression introduces in 4.8-rc3" href="https://bugs.freedesktop.org/show_bug.cgi?id=98505#c15">Comment # 15</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [Topaz] Regression introduces in 4.8-rc3" href="https://bugs.freedesktop.org/show_bug.cgi?id=98505">bug 98505</a> from <a class="email" href="mailto:alexdeucher@gmail.com" title="Alex Deucher <alexdeucher@gmail.com>"> Alex Deucher</a> <pre>(In reply to Peter Wu from <a href="show_bug.cgi?id=98505#c14">comment #14</a>) > (In reply to Alex Deucher from <a href="show_bug.cgi?id=98505#c12">comment #12</a>) > [..] > > > Lowering the minumum from 2015 to 2014 should work for nouveau: > > > <a href="https://lists.freedesktop.org/archives/nouveau/2016-July/025619.html">https://lists.freedesktop.org/archives/nouveau/2016-July/025619.html</a> > > > > > > > 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). > I had access to the PR3 spec internally. I'm not sure if it's available publicly or not. Support for displays was not included in the information I saw or from talking with our internal hybrid graphics architects. It's possible the spec has been updated since I last talked to them earlier this year. I can double check. Does your new laptop use PR3 or the older nvidia proprietary ACPI method? > [0]: > <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/dn265510(v=vs.85">https://msdn.microsoft.com/en-us/library/windows/hardware/dn265510(v=vs.85</a>). > aspx > [1]: > <a href="https://msdn.microsoft.com/en-us/windows/hardware/commercialize/design/">https://msdn.microsoft.com/en-us/windows/hardware/commercialize/design/</a> > 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? I have not been. Please have a look. Thanks!</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>