[Bug 98505] [Topaz] Regression introduces in 4.8-rc3

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Nov 2 16:46:15 UTC 2016


https://bugs.freedesktop.org/show_bug.cgi?id=98505

--- Comment #11 from Peter Wu <peter at lekensteyn.nl> ---
(In reply to Alex Deucher from comment #10)
> (In reply to Peter Wu from comment #7)
> > Created attachment 127678 [details] [review] [review]
> > amdgpu patch that checks whether the new interface can be used for PM
> > 
> > PCIe port PM is not enabled because this BIOS is pre-2015: 12/04/2014
> > The BIOS seems to be able to report support for lots of things (can you post
> > a fuller dmesg that include the supported functions?):
> 
> Can we bump the bios white list to 2014?  Windows enabled Hybrid graphics on
> windows 8.x as well as 10, and a number of preliminary win10 systems have
> 2014 bios versions. I'd prefer that to doing all of these hacks in the drivers.

Lowering the minumum from 2015 to 2014 should work for nouveau:
https://lists.freedesktop.org/archives/nouveau/2016-July/025619.html

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.

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