Here's my debug output:
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11212) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2466) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
Alienware.XI1546.BRIGHTNESS.get_brightness(ref 0) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11212) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2466) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11212) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2466) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11230) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2466) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11230) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2466) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11230) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2461) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11230) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2461) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11159) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2461) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11159) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2461) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11159) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2461) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11159) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2461) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11159) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2457) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
ACPI.NAME.Read("DSEN", ref 1) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.CRT._DGS", ref 0) . . . OK
ACPI.NAME.Read("_SB.PCI0.PEGP.VGA.DVI._DGS", ref 0) . . . OK
Alienware.XI1546.HARDWARE.refresh( ) . . . OK
ACPI.METHOD.Call("_TZ.THRM") . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.XHPP", ref 57) . . . OK
ACPI.FIELD.Read("PSVT", ref 95) . . . OK
ACPI.FIELD.Read("CRTT", ref 100) . . . OK
ACPI.FIELD.Read("PCP0", ref 191) . . . OK
ACPI.FIELD.Read("PCP1", ref 191) . . . OK
Alienware.XI1546.SENSORS.refresh( ) . . . OK
ACPI.METHOD.GetValue("_SB.PCI0.LPCB.EC0.ACIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XCIN", ref 0) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST3", ref 11159) . . . OK
ACPI.FIELD.Read("_SB.PCI0.LPCB.EC0.XST2", ref 2457) . . . OK
Alienware.XI1546.BATTERY.refresh( ) . . . OK
Here's where I see the "Not working" message. It doesnt show in debug so I had to do a screen capture
http://whitechristmasradio.com/Clipboard02.jpg