I tried it but, sorry to report, the results are the same: pavucontrol
claims that the HDMI is unplugged.
I also checked with "aplay -D" commands and none of the HDMI devices
detected will play. The internal audio and a USB device are detected
and work fine.
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Packages, which is subscribed to pulseaudio in Ubuntu.
No HDMI audio on Lenovo pro dock with T440s
Status in pulseaudio package in Ubuntu:
pavucontrol shows Display Port/HDMI output as "(unplugged)" and cannot
be chosen as a sink. This is only a problem with the dock; audio
works when plugging HDMI through the laptop's DP input.
The audio did work with the dock in Ubuntu 14.04. Did something in
jack detection change? Anyway, my work around is to plug a 3.4mm
audio cable into the dock and power the speakers that way, but it
would be nice to use the HDMI audio again.
I would love to have a work around. I've attached the output from
alsa-info.sh, just in case this is useful.
DistroRelease: Ubuntu 16.04
Package: pulseaudio 1:8.0-0ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
USER PID ACCESS COMMAND
/dev/snd/controlC3: weinberg 2221 F.... pulseaudio
/dev/snd/controlC2: weinberg 2221 F.... pulseaudio
/dev/snd/controlC0: weinberg 2221 F.... pulseaudio
/dev/snd/controlC1: weinberg 2221 F.... pulseaudio
Date: Mon May 16 17:18:06 2016
InstallationDate: Installed on 2016-05-06 (10 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
PATH=(custom, no user)
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.version: GJET74WW (2.24 )
dmi.board.asset.tag: Not Available
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.version: Not Available
dmi.product.version: ThinkPad T440s
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