[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 #76 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
OK,

Can you add "options ACPI_DEBUG" to your kernel configuration file?

Then in /boot/loader.conf add:

debug.acpi.layer="ACPI_ALL_COMPONENTS ACPI_ALL_DRIVERS"
debug.acpi.level="ACPI_LV_ERROR"

The list of valid keywords are given by:
sys/dev/acpica/acpi.c

Try to correlate an ACPI event with the enumeration failure!

If no ACPI events, try to enable more ACPI debug layers/levels until you find
such an event or error message.

--HPS

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