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Date:      Wed, 07 Aug 2019 08:52:49 +0000
From:      bugzilla-noreply@freebsd.org
To:        usb@FreeBSD.org
Subject:   [Bug 237666] repeated messages of "uhub_reattach_port: giving up port reset - device vanished"
Message-ID:  <bug-237666-19105-Qb6vt33hOO@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-237666-19105@https.bugs.freebsd.org/bugzilla/>
References:  <bug-237666-19105@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237666

--- Comment #16 from Hans Petter Selasky <hselasky@FreeBSD.org> ---
Does it help to set:

sysctl hw.usb.disable_enumeration=3D1

After boot. Does the UPS still work?

I suspect the issue has nothing to do with USB, but likely early AP startup
(timing issue, can be disabled in kernel build) or ACPI's recent USB suppor=
t.

1) Try removing this option from kernel config:
sys/amd64/conf/GENERIC:options  EARLY_AP_STARTUP

2) Try booting with the following line added to /boot/loader.conf:

debug.acpi.disabled=3D"usb"

--HPS

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