I've had issues with hdmi audio since the latest updates
https://discuss.getsol.us/d/9640-fresh-solus-install-experiencing-no-audio-through-hdmi/19
and while the problem seemed to be solved for a while, I now have issues not only with sound but image too, and it is not connected to hdmi: Video on netflix or other streaming sites is not working - the image just freezes and there is no sound (even when laptop is not connected to hdmi.)
sudo dmesg output here:
I had no issues with videos or sound for years.. thinking if I should go back to the previous kernel..