[Bug 194727] uaudio device gets disconnected, and hangs usb until everything using /dev/mixer* is closed

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 30 Oct 2022 09:12:12 UTC

--- Comment #86 from Ivan <bsd@abinet.ru> ---
Brilliant! I've switched to nonexistent dsp device in rc.suspend and playback
paused. On resume, I switch back and playback starts again.

Why virual_oss behaves differently on kvm switch out and suspend is a mystery
though. In both cases uaudio and usb hub disappears, however on suspend
virtual_oss doesn't release descriptor to pcm =/

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