https://bugzilla.kernel.org/show_bug.cgi?id=15174
Robert Moore <robert.mo...@intel.com> changed:
What |Removed |Added
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CC| |robert.mo...@intel.com
--- Comment #17 from Robert Moore <robert.mo...@intel.com> 2010-03-24 15:11:39
---
I think what happens in these cases is that the BIOS is dynamically changing
the size of the _PSS package on the fly. The key would be this statement:
Name (_PSS, Package (0x03)
indicating that only 3 of the _PSS sub-packages are valid. So, the original ASL
code has the worst-case size of _PSS, and the package is truncated by the BIOS
as necessary.
The ACPICA code will truncate this _PSS package to three sub-packages and emit
an exception. If this is not happening, perhaps there is a bug.
/*
* NumElements was exhausted, but there are remaining elements in the
* PackageList. Truncate the package to NumElements.
*
* Note: technically, this is an error, from ACPI spec: "It is an error
* for NumElements to be less than the number of elements in the
* PackageList". However, we just print a message and
* no exception is returned. This provides Windows compatibility. Some
* BIOSs will alter the NumElements on the fly, creating this type
* of ill-formed package object.
*/
...
ACPI_INFO((AE_INFO,
"Actual Package length (0x%X) is larger than NumElements field (0x%X),
truncated\n",
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