F22 upgrade, No sound through HDMI
Just upgraded my F20 desktop this weekend, first to F21 and then this morning to F22.
The only problem I noticed is the HDMI sound no longer works. It stopped working after the F20 --> F21 upgrade.
I experienced the same problem with F20 and I believe I fixed it using the suggestion HERE (adding radeon.audio=1 to the grub config).
I tried the solution I used before with F20, but it no longer works (with F22).
I don't know if this will help, but here is the output of the aplay -l command,