linux-kernel - Re: [REGRESSION] i915: No HDMI output with 4.4

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Message-ID: <20160211082105.GC11240@phenom.ffwll.local>
Date:	Thu, 11 Feb 2016 09:21:05 +0100
From:	Daniel Vetter <daniel@...ll.ch>
To:	Oleksandr Natalenko <oleksandr@...alenko.name>
Cc:	Daniel Vetter <daniel.vetter@...el.com>,
	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Ville Syrjälä 
	<ville.syrjala@...ux.intel.com>
Subject: Re: [REGRESSION] i915: No HDMI output with 4.4

On Thu, Feb 11, 2016 at 09:45:17AM +0200, Oleksandr Natalenko wrote:
> Daniel,
> 
> I do confirm that this hacky patch:
> 
> https://lkml.org/lkml/2016/1/19/637
> 
> works around my issue. I understand that this is improper fix, so let me
> know how could I debug my issue further.

Please boot with drm.debug=0xe and attach the dmesg. Also please test the
patch later on in this thread:

https://lkml.org/lkml/2016/2/9/587

Ville is working on a proper fix for this specific case. But could be that
you're hitting yet another issue.

Thanks, Daniel

> 
> Thanks.
> 
> 09.02.2016 12:11, Daniel Vetter wrote:
> >Can you please retest with latest -rc? There's been some bugs in the HDMI
> >detection changes, which should be fixed now.
> >
> >If that doesn't help please try to bisect which exact change caused the
> >regression.
> >
> >Thanks, Daniel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch