The symptoms and behavior are nearly the same, so the issue seems
closely related, if not the same. However, the report is for different
hardware and dock (UltraDock rather than OneLink dock although both
Haswell). But, without doing the back port of Dave Airlie's patches to
4.9.x, 4.10.x or
check if this is a dupe of:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1467190/
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https://bugs.launchpad.net/bugs/1582414
Title:
No HDMI audio on Lenovo pro
I tried it as well and it is still showing as unplugged.
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Title:
No HDMI audio on Lenovo pro dock with T440s
Status in
Thanks Luke.
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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Folks still affected by this bug could try using newer ALSA drivers. See
https://wiki.ubuntu.com/Audio/UpgradingAlsa/DKMS.
** Changed in: pulseaudio (Ubuntu)
Assignee: Luke Yelavich (themuso) => (unassigned)
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Hello and thanks to Martin to open the Bug report and doing all the
research as well thanks to the launchpad team!
I got the same problem with Ubuntu 16.04 on my private and my office
laptop (T440s and T440 on an ultra dock).
Upgrading the dock's firmware didn't help, too.
It would be nice to
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: pulseaudio (Ubuntu)
Status: New => Confirmed
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I also tried 14.04.2, which is kernel 3.16.0-30, and that also detected
the HDMI/DP.
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Title:
No HDMI audio on Lenovo pro dock
Thanks.
Booted with the latest daily, which is kernel 4.4.0, and it does not
detect HDMI/DisplayPort on the ThinkPad ultra dock.
Also, from the old-releases repo, I downloaded the 14.04.1 iso running
kernel 3.13.0-32, and that one DOES detect the HDMI/DisplayPort.
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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,
Does this issue have to do with MST support in kernel 4.4? The 3.13 in
14.04 did not have MST support.
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https://bugs.launchpad.net/bugs/1582414
Title:
No HDMI audio
Luke, do you know offhand if those sort of issues are rather due to the
audio stack or the kernel?
** Changed in: pulseaudio (Ubuntu)
Importance: Undecided => Low
** Changed in: pulseaudio (Ubuntu)
Assignee: (unassigned) => Luke Yelavich (themuso)
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