Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: alsa-driver (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1643122
Title:
Ubuntu 16.04 No Sound From Web Videos on HDMI
Status in alsa-driver package in Ubuntu:
Confirmed
Bug description:
I have 4 x Intel NUC D54250WYK which we use as Kodi media centres,
connected to a central MythTV backend server. The NUCs also have
Google Chrome installed, which we use to watch Netflix. Each of the
NUC's are built exactly the same, using the same HDMI cables, all
connected to LCD TVs. All sound was working perfectly via HDMI on
14.04 LTS, before upgrading to 16.04.
After fresh installs of 16.04 LTS, sound no longer works via the HDMI
interface, if I attempt to watch Netflix, Youtube, or even sound from
Pandora music streaming - anything from the Internet. I have the
ubuntu-restricted-extras / addons installed, and have followed all the
guides on PulseAudio, and pavucontrol.
I have upgraded / downgraded NUC firmware and turned sound on and off
in the BIOS, reset the default setting and loaded previous working
profiles, however all sound from Web Browsers fails to work through
the HDMI adapter.
I have Google Chrome and even installed the latest Firefox 49 Beta
which supports DRM, Netflix videos work fine, but no down.
If I open up pavucontrol, I can see Chrome / Firefox audio levels seem
to be active in the HDMI control panel, i.e. the levels are moving in
tune with the video stream, but not directed to HDMI output.
I can get it to work under one scenario.... If I trick the audio by
playing a video in Kodi so the sound is active, then I start Chrome /
Firefox and I can watch Netflix / Youtube videos with sound. But I
have to flick over to Kodi to stop the movie, before returning to the
web browser to continue the show. If I pause or click on another link,
the sound dies, and I have to shut down the browser and trick the
audio system again before it works; this obviously is not ideal.
Sound will work via the headphone jack if I switch audio output from
HDMI to analog, in sound control application.
So in a nutshell, I think PulseAudio is working, however somewhere
along the connection between web browser / pulse / HDMI interface,
appears not to be.
TEMPORARY SOLUTION: The only fix I have been able to get working, is
to set Gnome to HDMI resolution of 1440x900, then sound will work on
web videos, however this defeats the purpose of 1080P / HDMI...
FULL DIAGNOSIS: I have provided extensive logs and updates at:
https://answers.launchpad.net/ubuntu/+source/alsa-
driver/+question/399296
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