[Bug 237666] repeated messages of "uhub_reattach_port: giving up port reset - device vanished"

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237666

--- Comment #166 from tech-lists at zyxst.net ---
(In reply to Gerard Seibert from comment #165)

OK. Commenting out device xhci from the generic config "fixes" the problem, in
that the "device vanished" messages no longer appear at the console/dmesg.[1]

So this narrows it down to a problem between 'ASM1142 USB 3.1 Host Controller'
and xhci

[1] ofc theres no usb3 connectivity now, either.

This is on stable/12-n232774-d88ac710ce5 built today (new world+kernel)

So there needs to be either a fix for the issue or a couple of workarounds
depending on your use case:

1. presumably your usb3 is built into the motherboard. switch it off in the
bios and install a usb3 card known to work if you really need usb3.

2. just do what i did and disable xhci and recompile if you can do without usb3
functionality. I can do this because the machine in question is a headless
server rather than a desktop.

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