Diagnosing probable USB hardware failure

[Hans Petter Selasky]

On 1/24/19 9:51 PM, Phil Norman wrote:
> 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.
> 

Hi,

Did you try to enable the XHCI debugging sysctl to get more information?

sysctl hw.usb.xhci.debug=16

--HPS