The best way to determine whether this is kernel related is to test a recent daily trusty live image that has a newer kernel... I think newer images have the xenial kernel on them, so this would be a good way to determine where the problem is. A fair bit changed in pulse between trusty and xenial, and same with the kernel.
Martin, please download the latest daily image from http://cdimage.ubuntu.com/trusty/daily-live, put it onto a bootable device or an optical disk, and boot from it. Try and use the dock's DP/HDMI connection and report back. Thanks. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1582414 Title: No HDMI audio on Lenovo pro dock with T440s Status in pulseaudio package in Ubuntu: New Bug description: 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. ProblemType: Bug 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 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: 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 CurrentDesktop: Unity Date: Mon May 16 17:18:06 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2016-05-06 (10 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/19/2014 dmi.bios.vendor: LENOVO dmi.bios.version: GJET74WW (2.24 ) dmi.board.asset.tag: Not Available dmi.board.name: 20ARA0S100 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGJET74WW(2.24):bd03/19/2014:svnLENOVO:pn20ARA0S100:pvrThinkPadT440s:rvnLENOVO:rn20ARA0S100:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20ARA0S100 dmi.product.version: ThinkPad T440s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1582414/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
