linux-kernel - ACPI exception with 2.6.29-rc6

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Date:	Mon, 23 Feb 2009 17:46:51 +0100
From:	Heinz Diehl <htd@...cy-poultry.org>
To:	linux-kernel@...r-kernel.org
Subject: ACPI exception with 2.6.29-rc6

Hi,

booting 2.6.29-rc6 shows the following in boot.log:

[....]
<7>bus: 00 index 4 mmio: [230000000, fcffffffff]
<6>ACPI: bus type pci registered
<5>PCI: MCFG configuration 0: base f0000000 segment 0 buses 0 - 127
<5>PCI: MCFG area at f0000000 reserved in E820
<6>PCI: Using MMCONFIG at f0000000 - f7ffffff
<6>PCI: Using configuration type 1 for base access
<4>bio: create slab <bio-0> at 0
<7>ACPI: EC: Look up EC in DSDT
--> <3>ACPI: Denied BIOS AML access to invalid port 0x4d0+0x2 (ELCR)
--> <4>ACPI Exception (dsopcode-0419): AE_AML_ILLEGAL_ADDRESS, During address validation of OpRegion [ELCR] [20081204]
<6>ACPI: Interpreter enabled
<6>ACPI: (supports S0 S1 S5)
<6>ACPI: Using IOAPIC for interrupt routing
<6>ACPI: No dock devices found.
<6>ACPI: PCI Root Bridge [PCI0] (0000:00)
<7>pci 0000:00:01.1: reg 10 io port: [0xe800-0xe83f]
[....]

...while 2.6.28.7 boots without showing any ACPI exception:

[....]
<7>bus: 00 index 3 mmio: [d0000000, efffffff]
<7>bus: 00 index 4 mmio: [230000000, fcffffffff]
<6>ACPI: bus type pci registered
<5>PCI: MCFG configuration 0: base f0000000 segment 0 buses 0 - 127
<5>PCI: MCFG area at f0000000 reserved in E820
<6>PCI: Using MMCONFIG at f0000000 - f7ffffff
<6>PCI: Using configuration type 1 for base access
<7>ACPI: EC: Look up EC in DSDT
<6>ACPI: Interpreter enabled
<6>ACPI: (supports S0 S1 S5)
<6>ACPI: Using IOAPIC for interrupt routing
<6>ACPI: No dock devices found.
<6>ACPI: PCI Root Bridge [PCI0] (0000:00)
<7>pci 0000:00:01.1: reg 10 io port: [0xe800-0xe83f]
[....]

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