LOTS of ACPI related messages on older Acer server

[YONETANI Tomokazu]

On Thu, Jan 18, 2007 at 01:06:19AM +1100, Petr Janda wrote:
> output of dmesg is attached. Im running DF 1.6.2 on this. They seem not 
> to interfere but are annoying at least.
>     ACPI-0252: *** Error: No object was returned from [\\_SB_.PII0._STA] (Node 0xc24012d0), AE_NOT_EXIST

This may or may not be fixed by turning on the interpreter slack support;
modify /sys/dev/acpica5/acpi.c as follows and rebuild the acpi.ko and
reboot:

    /*
     * Set the globals from our tunables.  This is needed because ACPI-CA
     * uses UINT8 for some values and we have no tunable_byte.
     */
    AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods;
    AcpiGbl_EnableInterpreterSlack = TRUE;	<== ADD THIS

I didn't commit this simple change apart because I saw the following note
in changes.txt in newer version of ACPI-CA source code:

  12 May 2006. Summary of changes for version 20060512:

  1) ACPI CA Core Subsystem:
				:
  Fixed a possible memory leak associated with the support for the
  so-called "implicit return" ACPI extension. Reported by FreeBSD,
  BZ #6514. (Fiodor Suietov)

Cheers.