(In reply to Takashi Iwai from comment #29) > It's only for testing, so better to edit in GRUB menu than in YaST. > Just pass: > acpi_osi="!Windows 2012" > > See that you gave the opening quote at the wrong place. Check dmesg output. I did - that was the first dmesg ############################ when I entered acpi_osi="!Windows 2012" during boot - It later displayed "acpi_osi=!Windows 2012" in hwinfo