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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [IT6506 Display Receiver] DP hotplug fails (display and audio) with i915/kernel 3.11.1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70301#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [IT6506 Display Receiver] DP hotplug fails (display and audio) with i915/kernel 3.11.1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70301">bug 70301</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=70301#c13">comment #13</a>)
<span class="quote">> (In reply to <a href="show_bug.cgi?id=70301#c12">comment #12</a>)
> > (In reply to <a href="show_bug.cgi?id=70301#c10">comment #10</a>)
> > > (In reply to <a href="show_bug.cgi?id=70301#c8">comment #8</a>)
> > > > Please try v3.12-rc4 which should have
> > > >
> > > > commit bc86625a4ff7574d4d4dba79723457711eb784e0
> > > > Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
> > > > Date: Sun Jul 21 16:00:03 2013 +0100
> > > >
> > > > drm/i915: Retry DP aux_ch communications with a different clock after
> > > > failur
> > > >
> > > > which changes the divider and adds a retry with another divider.
> > >
> > > 1. The DP display issue(which may have to do with aux timeout) was gone with
> > > commit bc86625a4ff7574d4d4dba79723457711eb784e0 (please see the kernel log
> > > that I attached to this thread).
> > >
> > > 2. The DP display issue still exists in the commit prior to commit
> > > bc86625a4ff7574d4d4dba79723457711eb784e0.
> >
> > Daniel, we need to consider backporting Chris' fix to stable kernels.
> >
> > > 3. The DP audio issue exists in commit
> > > bc86625a4ff7574d4d4dba79723457711eb784e0 (no card codec interface was found
> > > in /proc/asound/)
> >
> > From the logs:
> >
> > [ 8.878426] ALSA sound/pci/hda/hda_intel.c:3807 Haswell must build in
> > CONFIG_SND_HDA_I915
> > [ 8.878428] ALSA sound/pci/hda/hda_intel.c:3836 Error request power-well
> > from i915
> >
> > Do you have CONFIG_SND_HDA_I915=y instead of =m?
> >
>
> => Sorry, tt might be my mistake to use the incorrect kernel configuration.
> I will update it later.
>
>
> > Also, I'm confused by your dmesg in <a href="show_bug.cgi?id=70301#c9">comment #9</a> having "Linux version
> > 3.11.0-rc2+" and the line numbers above match that kernel version. Were you
> > running some frankenstein combination of 3.11-rc2 and 3.12-rc4 or what?
>
> => I used git reset --hard bc86625a4ff7574d4d4dba79723457711eb784e0 (VERSION
> = 3, PATCHLEVEL = 11, SUBLEVEL = 0 EXTRAVERSION = -rc2 in Makefile)</span >
That doesn't do what you think it does. Use git checkout.</pre>
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