http://bugzilla.kernel.org/show_bug.cgi?id=5966

           Summary: irq 10: nobody cared - Thinkpad 600E
    Kernel Version: 2.6.16-rc1
            Status: NEW
          Severity: normal
             Owner: [EMAIL PROTECTED]
         Submitter: [EMAIL PROTECTED]
                CC: acpi-bugzilla@lists.sourceforge.net


This laptop has a BIOS from 1999 that has not often run ACPI
due to the traditional blacklist date.  However, some
have deleted the blacklist date, exposing an ACPI failure.

It appears that the PCI Interupt Link Devices are are reading
0 from the underlying PIIX4 PIRQx Route Control Registers.
Futher, it appears that writes to those registers have no effect.

eg. for LNKA:

ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.

ACPI: PCI Interrupt Link [LNKA] disabled and referenced, BIOS bug.
ACPI: PCI Interrupt Link [LNKA] BIOS reported IRQ 0, using IRQ 9
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 9

But instrumentation from a modified DSDT shows that the register
is 0 both before and after writing 9 to it.

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