Date: Fri, 25 Jan 2019 17:56:06 +0100 From: Gary Jennejohn <gljennjohn@gmail.com> To: Phil Norman <philnorm@gmail.com> Cc: Hans Petter Selasky <hps@selasky.org>, usb@freebsd.org Subject: Re: Diagnosing probable USB hardware failure Message-ID: <20190125175606.2d260d3c@ernst.home> In-Reply-To: <CAOa8eG6-%2BQ42DtW6M%2BTfQtS9AJHGPyUBX3hz=4OK44tt6raGmw@mail.gmail.com> References: <CAOa8eG5hnBYpuv3s8MR05UZNxN8n8W9=gPv%2BpKhFiARrvx0Lmg@mail.gmail.com> <2ef9ce91-27cb-fced-aa08-1c26b28f3991@selasky.org> <CAOa8eG7wF12CcfqA8ppSkvOfkUvZ55-3qmtw0nUVR8hWqhWOPw@mail.gmail.com> <709569e7-a7f8-9431-a83b-ad8d9f5546ec@selasky.org> <CAOa8eG6-%2BQ42DtW6M%2BTfQtS9AJHGPyUBX3hz=4OK44tt6raGmw@mail.gmail.com>
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On Fri, 25 Jan 2019 17:16:39 +0100 Phil Norman <philnorm@gmail.com> wrote: > Thanks for the suggestion; I tried them all (enabling one at a time, but > ending up with all four set), and I get the same USB_ERR_TIMEOUT loop on > each boot. > > Note that even before I get to the FreeBSD bootloader screen (so while the > UEFI thing is initialising), there's a very significant (5-10s) delay on a > warm boot, during which the keyboard caps lock light won't toggle; this > doesn't happen on a cold boot. For this reason, I strongly suspect a > hardware failure. > > My main question is really, how I figure out if it's the CPU or the > motherboard at fault. I'd rather not change the wrong one, or unnecessarily > change a working part. > > I notice the internet has quite a few stories of this motherboard having > USB difficulties (allegedly due to build quality issues); that would be my > main suspicion, although I managed to bend some of the CPU pins, and had to > bend them back with a needle, so I can't rule that out either (note: I did > get all the pins back straight, and none fell off, or gave a feeling of > wobbliness or weakness). > I have a Ryzen 5. Based on the trace you posted, I see that the AMD 300 Series USB 3.0 controller and AMD KERNCZ USB 3.0 controller are apparently failing. To the best of my knowledge, these controllers are integrated in the CPU itself. So, I'd guess that the bent CPU pins may well be the cause of your problems. My Ryzen 5 does not exhibit any of the problems which you're seeing. -- Gary Jennejohn
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