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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BXT-P/APL] DP and HDMI will stop output after resumed from S3"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94439#c28">Comment # 28</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BXT-P/APL] DP and HDMI will stop output after resumed from S3"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94439">bug 94439</a>
from <span class="vcard"><a class="email" href="mailto:humberto.i.perez.rodriguez@intel.com" title="Humberto Israel Perez Rodriguez <humberto.i.perez.rodriguez@intel.com>"> <span class="fn">Humberto Israel Perez Rodriguez</span></a>
</span></b>
<pre>(In reply to Imre Deak from <a href="show_bug.cgi?id=94439#c27">comment #27</a>)
<span class="quote">> I believe that S3 failing in itself (so not the hotplug issue originally
> reported) is not a BIOS issue. I could reproduce it on my machine with a
> recent BIOS:
> APLKRVPA.X64.0130.B11.1603210634
>
> With a few fixes S3 works now for me and those fixes could be also relevant
> here.
> So Humberto, besides trying to upgrade the BIOS as Yann suggested could you
> also try the following branch:
> <a href="https://github.com/ideak/linux/commits/bxt-rpm">https://github.com/ideak/linux/commits/bxt-rpm</a></span >
Hi Imre Deak :
i tried with a newer bios 131.10 and the branch :
<a href="https://github.com/ideak/linux/commits/bxt-rpm">https://github.com/ideak/linux/commits/bxt-rpm</a>, but is the same issue, after
return from S3 the HDMI is not seen and xrandr also does not recognize it
kernel info
==================
commit 068ab4d97212c00defebf525821001785c7caf2e
Author: Imre Deak <<a href="mailto:imre.deak@intel.com">imre.deak@intel.com</a>>
Date: Fri Apr 8 20:40:16 2016 +0300
drm/i915/bxt: Sanitize DC state tracking after suspend-to-ram and -disk
After suspend-to-ram or -disk we don't know what power state the display
is, DC0 or DC9 are both possible states, so reset the DC software tracking
in these cases. This gets rid of 'DC state mismatch' error messages
during suspend to ram and disk which is a false positive based on the
above.
Signed-off-by: Imre Deak <<a href="mailto:imre.deak@intel.com">imre.deak@intel.com</a>>
branch = bxt-rmp
kernel = 4.6.0-rc2</pre>
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