[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 #159 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
Hi Gerard,

There is no news here basically.

However, can you try installing the latest 11 release.

Then checkout sources for FreeBSD 12-stable.

Then do two experiments:

a) Apply the PCI debug patch to an 11-stable kernel. Reboot. Is any output
produced?

b) Apply the PCI debug patch to an 12-stable kernel. Reboot. Is any output
produced?

I have a suspicion something in ACPI is using input from an invalid PCI
register and writing to a valid one.

--HPS

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