On 2015-09-01 21:38, Brad Figg wrote:
> On Tue, Sep 01, 2015 at 12:04:05PM +0200, David Henningsson wrote:
>> This is a patch set fixing a long-standing bug for some Haswell, Broadwell 
>> and most Skylake machines.
>>
>> When the HDA audio controller is in D3, a hotplug event (i e, HDMI or 
>> DisplayPort being plugged in) fails to wake up the audio side so it never 
>> registers that something has happened.
>>
>> By having the i915 driver call directly into the hda driver, the HDA driver 
>> is always notified that an HDMI hotplug event has happened.
>>
>> I've been trying to get this through upstream, but it has been slower than 
>> usual due to it touching both the i915 and HDA subsystems, and ideally I 
>> wanted it in there first, but I don't think OEM wants to miss another SRU 
>> cycle. So this is on its way in upstream, but not there yet. The patches 
>> here are based on v5 of my patch set, and v4 were both reviewed by Jani 
>> Nikula and Takashi Iwai.
>>
>> Now, I've tested the upstream version, but I've just backported this to 3.19 
>> without any testing. I could use Timo's assistance here so we coordinate 
>> testing this with other i915 changes for the next SRU cycle. And I could use 
>> Timo's help to make sure this applies equally to i915 and i915_bpo.
>>
>> BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1490895
> I want to see some positive test results in the bug before I'm going to
> take this.

Me too. :-)

Once Timo has a finished build (and I've provided him with a version 
that actually compiles, *ahem*), could Anthony help assign people to 
help us test it? It would be very nice if we could have this tested on 
more than one of (Skylake / Broadwell / Haswell).

@Anthony, if you look at the duplicates for bug 1490895 (e g, 1383997) I 
think you'll quickly understand what all of this is about.

-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic

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https://bugs.launchpad.net/bugs/1490895

Title:
  Skylake/Broadwell/Haswell: No HDMI audio jack detection in D3

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