I have the same hardware as you and had the same problem.
While trying to fix it, I toggled the pulse output from HDMI to internal audio back and forth a couple of time and it suddenly started to work again. I have no idea why, but it works for me now.
I have the same hardware as you and had the same problem.
While trying to fix it, I toggled the pulse output from HDMI to internal audio back and forth a couple of time and it suddenly started to work again. I have no idea why, but it works for me now.