Comment 5 for bug 1255843

The _PCL(Power Consumer List) method, evaluates to a list of pointers, each pointing to a device or a bus powered by the power source device (AC, battery). this method seems is defined but is not used in Linux kernel. It should not affect the AC, battery functions.

The _BCM failure might affect the brightness control, or it might directly control by graphic drivers not through the ACPI methods. Need to check if there are any brightness issue on this machine.