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Date: Mon, 15 Feb 2016 10:55:33 +0200
From: Oleksandr Natalenko <oleksandr@natalenko.name>
To: =?UTF-8?Q?Ville_Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>, intel-gfx@lists.freedesktop.org,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Daniel Vetter <daniel.vetter@ffwll.ch>
Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
Organization: pf-kernel developing community
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13.02.2016 01:23, Ville Syrjälä wrote:
> - Do you have another monitor to try?
> - Do you have another cable to try?

More on this.

Computer DVI —— old DVI-HDMI cable —— old monitor HDMI == not working
Computer DVI —— another DVI-HDMI cable —— old monitor HDMI == not 
working
Computer DVI —— DVI-DVI cable —— another monitor DVI == works

So

> Shouldn't really matter. HDMI and DVI are identical at this level.

Not quite, as far as I can see.