Sound device keeps reverting from hdmi2 to stereo

[Richard Shaw]

I have a F23 system which I use as a HTPC and occasionally the audio
reverts from hdmi2 in the devices to the on-board stereo sound card.

I'm not sure what keywords to use to see if this has been reported in
bugzilla but I wasn't able to find anything I thought relevant.

Anyone have any ideas?

Thanks,
Richard