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

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194727

--- Comment #44 from Greg V <greg at unrelenting.technology> ---
So while hotplug-unplug has been working reliably with pulse (with my version),
this is still an issue with suspend. (Oddly, depending on which bus I plug the
device into, it's either the waiting to exit message loop or a silent hang.)

Userspace does not have the ability to respond at all when the detach is
happening because of suspend!

Now, the workaround is (of course) kldunload snd_uaudio in /etc/rc.suspend and
kldload snd_uaudio in /etc/rc.resume. But having to do that is not great.

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