I ran the commands you suggested.
speaker-test -l 2 -c 8 -r 48000 -D hw:1,7
speaker-test -l 2 -c 8 -r 48000 -D plughw:1,7
Both ran but with no sound.
I tried to run this, gstreamer-properties, but it was not installed.
I do not have gnome installed. I am running xfce.
I don't think this is an alsa bug as this did not work when I was using a previous version of alsa either.
I am completly perplexed with this one.