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Date:      Thu, 3 Apr 2003 17:34:14 +1000 (EST)
From:      Bruce Evans <bde@zeta.org.au>
To:        "Cagle, John (ISS-Houston)" <john.cagle@hp.com>
Cc:        freebsd-current@freebsd.org
Subject:   RE: sio problem in -current (COM1)
Message-ID:  <20030403172912.A29833@gamplex.bde.org>
In-Reply-To: <C50AB9511EE59B49B2A503CB7AE1ABD10440E47A@cceexc19.americas.cpqcorp.net>
References:  <C50AB9511EE59B49B2A503CB7AE1ABD10440E47A@cceexc19.americas.cpqcorp.net>

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On Wed, 2 Apr 2003, Cagle, John (ISS-Houston) wrote:

> Thanks!  It was an ACPI-related problem.  I disabled ACPI
> (hint.acpi.0.disabled="1" in /boot/device.hints) and rebooted and now
> both com ports show up properly as they did with FreeBSD 4.8.  (These
> are just standard com ports, btw.)

We still don't know why acpi sometimes gets this wrong.

> I didn't realize ACPI was involved in legacy com port detection.  That's
> weird.

It seems to be used for most legacy ports.  IIRC, it found all except 2 or
3 devices according to your boot messages, with the vga devices being an
interesting exception (most vga devices are too new to even support pci).

Bruce



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