I forgot to add to my reply above that when I switched to the NVIDIA Version 346.59 (tested) driver the error message on boot failure changed from the original "Starting version 219" error to "ACPI PCC probe failed". I don't know whether that throws any additional light on the problem.
I forgot to add to my reply above that when I switched to the NVIDIA Version 346.59 (tested) driver the error message on boot failure changed from the original "Starting version 219" error to "ACPI PCC probe failed". I don't know whether that throws any additional light on the problem.