Date: Mon, 29 Sep 2003 13:33:06 -0700 (PDT) From: Nate Lawson <nate@root.org> To: acpi-jp@jp.FreeBSD.org Cc: current@freebsd.org Subject: Re: [acpi-jp 2704] Re: Odd ACPI behavior Message-ID: <20030929133012.M78288@root.org> In-Reply-To: <20030929202116.C3ED35D08@ptavv.es.net> References: <20030929202116.C3ED35D08@ptavv.es.net>
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On Mon, 29 Sep 2003, Kevin Oberman wrote:
> > Date: Mon, 29 Sep 2003 16:04:25 -0400 (EDT)
> > From: John Baldwin <jhb@FreeBSD.org>
> >
> > On 29-Sep-2003 Kevin Oberman wrote:
> > > I recently noticed that, when I boot with ACPI on my IBM T30, I get
> > > errors trying to probe the BIOS disabled sio1. This does not happen
> > > under apm and happens twice(?) when booting with ACPI and happens even
> > > though I have the line 'hint.sio.1.disabled="1"' in /boot/device.hints.
> > >>From my dmesg:
> > > sio0: type 16550A
> > > sio1: configured irq 3 not in bitmap of probed irqs 0
> > > sio1: port may not be enabled
> > > acpi_cmbat0: <Control method Battery> on acpi0
> > > acpi_cmbat1: <Control method Battery> on acpi0
> > > acpi_acad0: <AC adapter> on acpi0
> > > sio1: configured irq 3 not in bitmap of probed irqs 0
> > > sio1: port may not be enabled
> >
> > Do you kldload a module at some point during your boot? If so, that
> > would explain the double probe.
>
> Yes, it would, but I am not loading any kernel modules except the
> slightly automatic loads of ACPI, itself and a few others which should
> not cause a probe: ntfs, linux, linprocfs, and daemon_saver.
ACPI attaches the bus twice. See sys/dev/acpica/acpi.c:
/*
* Scan all of the child devices we have created and let them probe/attach.
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
bus_generic_attach(bus);
/*
* Some of these children may have attached others as part of their attach
* process (eg. the root PCI bus driver), so rescan.
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
bus_generic_attach(bus);
-Nate
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