Backstory
This thread suggests pacmd list-sinks
and switching to a different sink with pacmd set-default-sink "SINKNAME"
, but my laptop only appears to have 1 sink, so that didn't help me.
This thread suggests pacmd list-cards
which shows hdmi-output-0: HDMI / DisplayPort
right at the bottom of the output, and that looks right, but it still says Failure: No such entity
when I run pactl set-card-profile 0 output:hdmi-output
or pactl set-card-profile 0 output:hdmi-output-0