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Date:      Mon, 2 Jun 2014 23:32:13 +0200
From:      =?iso-8859-2?Q?Edward_Tomasz_Napiera=B3a?= <trasz@FreeBSD.org>
To:        freebsd-current@freebsd.org
Subject:   "CPU0: local APIC error 0x40"
Message-ID:  <D0664455-A1D7-4886-A32F-B004CAD92630@FreeBSD.org>
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Some machines, including ThinkPad T61, emit the following error message
early during boot:

CPU0: local APIC error 0x40

The message itself doesn't seem to be much of a problem.  However,
every once in a while booting hangs just before that line.  I've tracked
that down to call to AcpiHwWritePort() at
sys/contrib/dev/acpica/components/hardware/hwacpi.c:117:

    switch (Mode)
    {
    case ACPI_SYS_MODE_ACPI:

        /* BIOS should have disabled ALL fixed and GP events */

        Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
                        (UINT32) AcpiGbl_FADT.AcpiEnable, 8);

Any idea what might be going on?

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