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<b><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#c11">Comment # 11</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 <span class="vcard"><a class="email" href="mailto:peter@lekensteyn.nl" title="Peter Wu <peter@lekensteyn.nl>"> <span class="fn">Peter Wu</span></a>
</span></b>
<pre>(In reply to Alex Deucher from <a href="show_bug.cgi?id=98505#c10">comment #10</a>)
<span class="quote">> (In reply to Peter Wu from <a href="show_bug.cgi?id=98505#c7">comment #7</a>)
> > Created <span class=""><a href="attachment.cgi?id=127678" name="attach_127678" title="amdgpu patch that checks whether the new interface can be used for PM">attachment 127678</a> <a href="attachment.cgi?id=127678&action=edit" title="amdgpu patch that checks whether the new interface can be used for PM">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=98505&attachment=127678'>[review]</a> [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.</span >
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>
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.</pre>
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