Comment # 6
on bug 1163046
from Felix Miata
Note that comment #3 and attachment 829714 [details] apply to attempted use of
pavucontrol by admin user root.
It appears the problem is is basically there is no working automagic for HDMI
audio support, and lacking documentation explaining the means to make it work
manually. Thus -> new summary.
I was finally able to make HDMI sound work on multiple 15.1, 15.2 & TW
installations with each respective default kernel via pavucontrol, by totally
disabling analog video output, which means no headphone output is possible
while HDMI is kept enabled.
Pavucontrol is non-functional at the system admin/maintainer (root) level,
because pavucontrol is purposely and secretly disabled for root, or at least no
method is available based upon discoverable documentation for whatever other
method of configuration might exist.
https://doc.opensuse.org/release-notes/x86_64/openSUSE/Leap/15.1/index.html
lacks the strings audio, sound and HDMI. Googling "site:docs.opensuse.org hdmi
displayport audio sound" also comes up blank. Googling "site:doc.opensuse.org
hdmi" only produces hits for 8 years old 12.1. Googling "hdmi audio" did
produce several nebulous pointers to pavucontrol, but none anywhere on
opensuse.org on the first hit page, if anywhere at all.
If a pure alsa system is unable to produce HDMI audio output, that fact needs
discoverable documentation.
If YaST cannot be made to perform this configuration, there should at least be
discoverable documentation for an alternative configuration means.
(In reply to Takashi Iwai from comment #5)
> You can try to run "/usr/sbin/alsactl monitor" and plug/unplug the monitor.
> If this shows the event, and either "HDMI/DP,pcm=3 Jack" or "HDMI/DP,pcm=7
> Jack" shows true in alsa-info.sh output, the hotplug was done properly.
> The rest would be either the remaining audio setup (that is specific to
> AMD/ATI) or GPU driver problem.
@user> /usr/sbin/alsactl monitor
card 0, #12 (3,7,0,ELD,0) VALUE INFO
card 0, #7 (0,0,0,HDMI/DP,pcm=7 Jack,0) VALUE
card 0, #12 (3,7,0,ELD,0) VALUE INFO
card 0, #7 (0,0,0,HDMI/DP,pcm=7 Jack,0) VALUE
card 0, #12 (3,7,0,ELD,0) VALUE INFO
Comment #0 PC is being delivered to owner in coming minutes now that for it a
solution is in place.