_PLD in DSDT is declared as below:

                    Method (_PLD, 0, Serialized)
                    {
                        Name (PLDP, Package (0x01)
                        {
                            Buffer (0x10)
                            {
                                /* 0000 */    0x81, 0x00, 0x00, 0x00, 0x00, 
0x00, 0x00, 0x00,
                                /* 0008 */    0x30, 0x1C, 0x00, 0x00, 0x00, 
0x00, 0x00, 0x00
                            }
                        })
                        CreateBitField (DerefOf (Index (PLDP, Zero)), 0x40, VIS)
                        If (LNot (And (PR2S (0x0D), PR2)))
                        {
                            And (VIS, Zero, VIS)
                        }

                        Return (PLDP)
                    }

The problem occurs @ CreateBitField (DerefOf (Index (PLDP, Zero)), 0x40,
VIS).

In ACPI Spec, Index is defined as below:
 Syntax
    Index (Source, Index, Destination) => ObjectReference
 Arguments
    Source is evaluated to a buffer, string, or package data type. Index is 
evaluated to an integer. The reference to the nth object (where n = Index) 
within Source is optionally stored as a reference into Destination.

An integer is 64bit long and its bit index is from 0 to 63; however, the
above statement tries to reference to bit 64 and therefore it out of
range. If bit 64 in PLDP is needed, it must be referenced correctly.

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https://bugs.launchpad.net/bugs/1264071

Title:
  [Dell Inspiron 2350] Multiple HIGH / CRITICAL failures found in fwts
  report

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