Every time I install a new fedora, I think I lost sound because the new feddora always picks the motherboard audio output as the default, and I always listen via the TV speakers over HDMI.
I always run:
gnome-control-center sound
to change the default output to HDMI. It apparently does something undocumented to make HDMI out actually work. I spent most of a day once trying to get any of the command line tools to work, and I'd always get no sound even when all the info I could print said sound was going to HDMI. Never did figure that out.