On May 14, 2021 5:59:48 AM UTC, Mark Millard via freebsd-current
<freebsd-current@freebsd.org> wrote:
>The [usb{usbus2}] process eventually got stuck-busy, no
>more I/O:
>
>
>The system was a MACCHIATObin Double Shot.
I've noticed USB issues on the mcbin too.
In my experience uaudio was the most likely thing to freeze: sometimes when
playing audio the whole USB stack would hang, IIRC only unplugging and
reconnecting the hub would let USB I/O continue.
Looks like the XHCI hardware might not be fully stable here?? but I do wonder
if we could possibly lack some recovery mechanisms for this situation that
other OSes have.
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