> This procedure is sufficient when I use a USB 2 port.
I forgot to test USB 2 at the time of my original e-mail. There is actually a regression and both USB 2 and USB 3 ports throw the same error. --8<---------------cut here---------------start------------->8--- uaudio0: can't get iface handle uaudio0: can't get iface handle audio1: failed to start playback uaudio0: can't get iface handle --8<---------------cut here---------------end--------------->8---