Tried acpi_os_name="Windows 2006" and acpi_os_name="Windows 2009" with and without acpi_osi="!Linux".
There was no difference in dmesg or what was available under /sys/ :(
Tried acpi_os_ name="Windows 2006" and acpi_os_ name="Windows 2009" with and without acpi_osi="!Linux".
There was no difference in dmesg or what was available under /sys/ :(