Comment 2 for bug 1305624

In DSDT, _PCL is as below:

            Method (_PCL, 0, NotSerialized) // _PCL: Power Consumer List
            {
                Return (_SB)
            }

However, ACPI defines _PCL as

10.3.2 _PCL (Power Consumer List)
This object evaluates to a list of pointers, each pointing to a device or a bus powered by the power source device. Pointing to a bus indicates that all devices under the bus are powered by the power source device.

Arguments:
  None
Return Value:
  A variable-length Package containing a list of References to devices or buses

Therefore, _PCL should be refined to

            Method (_PCL, 0, NotSerialized) // _PCL: Power Consumer List
            {
                Return (Package(_SB))
            }