HDMI sound worked fine for years via GeForce GT 730/PCIe/SSE2 however stopped to work today for some uncertain reason. After recent kernel; upgrade to 5.12.9 commercial NVIDIA driver stopped to work (X does not start with it), so I select previous kernel version in grub on system load - [FONT=monospace]5.12.4-2-default. However I also tried to reinstall nvidia driver under [FONT=monospace]5.12.9 to make it work - no luck. However on some step sound disappeared for HDMI, pulseaudio (pavucontrol) does not see the device, while YAST does but play no test sound. Pulse sees only PCI [FONT=monospace]CMI8738-MC6 card which I do not use currently (no speakers). Removing nvidia driver, installing nouveau and back does not help. Any ideas how to diagnose and make it work?[/FONT][/FONT][/FONT]
It’s likely some regression by the looks, I don’t see the nvidia sound card or my default AMD GPU sound card present in pavucontrol. Note the AMD card sound is disabled due to another HDMI bug related to screen blanking, so am using the onboard sound card, the nvidia card is used for offload/cuda so no use for sound.
After this GF108 High Definition Audio Controller appeared in pavucontrol and in KDE however still no sound - it plays something however silent. Any other ideas? Seems upgrade broke some system settings or scripts.
Seems openSUSE tries to migrate to pipewire sound server. I tried to install pipewire-alsa and pipewire-pulseaudio packages and added my user to audio and **video **groups like mentioned here: https://bbs.archlinux.org/viewtopic.php?id=262066 - this completely removed pulse audio sound server for me. After this I was able to fine and enable GF108 High Definition Audio Controller in KDE system settings (was not visible in pulseaudio) after this it become visible in pulseaudio. However still no sound. However solution seems close.
upgrading Tumbleweed from snapshot 200201114 to 20210605 killed the HDMI sound of a ASUS VS278H.
a Samsung U28R55 (connected to the HDMI port of the PC, no built in speakers) has audio output. With no head phones available I plugged the speakers in (working when connected to the main board of the PC), but no sound at the monitor’s audio outlet since unpacking last year.