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Date:      Thu, 24 Jan 2019 21:51:23 +0100
From:      Phil Norman <philnorm@gmail.com>
To:        usb@freebsd.org
Subject:   Diagnosing probable USB hardware failure
Message-ID:  <CAOa8eG5hnBYpuv3s8MR05UZNxN8n8W9=gPv%2BpKhFiARrvx0Lmg@mail.gmail.com>

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Hi.

I have a Ryzen 3 1200, and Fatal1ty X370 mini-ITX motherboard. I've been
suffering USB problems (details here:
https://lists.freebsd.org/pipermail/freebsd-stable/2018-June/089155.html)
for a long time, have tried a bunch of BIOS updates, including the latest
for my motherboard. I've also gone through 3 versions of FreeBSD, and am
now on 12/stable.

In short, the only way I can have a stable USB system is by switching power
off, then booting up from cold, and then not removing or inserting any USB
devices. Kind of annoying.

I'm pretty convinced this is not an OS issue (I had the same problem on
NetBSD, and instability on Linux too, before I switched to FreeBSD).
However, I have no idea how much of the USB hardware is implemented in the
CPU, and how much in the motherboard. Can anyone help me with this
question, or point me at diagnostic tools for figuring out where the
problem is?

I'd be *very* happy to solve this problem.

Thanks in advance,
Phil



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