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Groups > linux.kernel > #1523407 > unrolled thread

Re: Lenovo Dock + Thinkpad X260 -> no HDMI audio output

Started bySebastian Reichel <sre@kernel.org>
First post2016-11-16 13:10 +0100
Last post2016-11-17 04:00 +0100
Articles 2 — 2 participants

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  Re: Lenovo Dock + Thinkpad X260 -> no HDMI audio output Sebastian Reichel <sre@kernel.org> - 2016-11-16 13:10 +0100
    Re: Lenovo Dock + Thinkpad X260 -> no HDMI audio output Norbert Preining <preining@logic.at> - 2016-11-17 04:00 +0100

#1523407 — Re: Lenovo Dock + Thinkpad X260 -> no HDMI audio output

FromSebastian Reichel <sre@kernel.org>
Date2016-11-16 13:10 +0100
SubjectRe: Lenovo Dock + Thinkpad X260 -> no HDMI audio output
Message-ID<sE7cl-2Bo-5@gated-at.bofh.it>

[Multipart message — attachments visible in raw view] — view raw

Hi Norbert,

On Wed, Nov 16, 2016 at 11:38:21AM +0900, Norbert Preining wrote:
> I am trying to get HDMI audio output via a Lenovo Dock Ultra in
> combination with a Lenovo Thinkpad X260.
>
> [...]

Lenovo Dock Ultra contains a DP-MST Hub to provide all those
HDMI/DVI/DP ports. Audio over DP-MST is currently not supported
by the i915 driver, but there are patches (developed since ~2014):

https://lists.freedesktop.org/archives/intel-gfx/2016-November/111353.html

-- Sebastian

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#1524043

FromNorbert Preining <preining@logic.at>
Date2016-11-17 04:00 +0100
Message-ID<sEl5D-33A-5@gated-at.bofh.it>
In reply to#1523407
Hi Sebastian,

> Lenovo Dock Ultra contains a DP-MST Hub to provide all those
> HDMI/DVI/DP ports. Audio over DP-MST is currently not supported
> by the i915 driver, but there are patches (developed since ~2014):
> 
> https://lists.freedesktop.org/archives/intel-gfx/2016-November/111353.html

Thanks a lot. I have tried out the patch including possible fixes for the
monitor disconnect issues mentioned in the freedesktop bug, but it does
not fix the problem of the disappearing external monitor.

Well, that means no audio-out for now, unfortunately. I will have to live
without that.

Thanks

Norbert

--
PREINING Norbert + TeX Live & Debian Developer + http://www.preining.info
GPG: 0x860CDC13    fp: F7D8 A928 26E3 16A1 9FA0  ACF0 6CAC A448 860C DC13

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