The failure,
 klog: HIGH Kernel message: [   16.601975] ACPI Warning: 
\_SB_.PCI0.PEG0.ATRB._DSM: Argument #4 type mismatch - Found [Buffer], ACPI 
requires [Package] (20131115/nsarguments-95)

for _DSM failure, kernel compliant about the mismatch of _DSM method(Device 
Specific Method)
>From ACPI spec,
This optional object is a control method that enables devices to provide device 
specific control
functions that are consumed by the device driver.
Arguments: (4)
Arg0 – A Buffer containing a UUID
Arg1 – An Integer containing the Revision ID
Arg2 – An Integer containing the Function Index
Arg3 – A Package that contains function-specific arguments

the #4 Arg (i.e Arg3 is defined as a Package) , but seems the graphic driver 
bright an Buffer to it.
This is not the Bios issue, It should be the graphic driver doesn't follow the 
spec.

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Title:
  [Dell Alienware X51] HIGH failures found in fwts report on 12.04.5

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