The grub option is supposed to be acpi_osi="Windows 2006". The /etc/default/grub file is sourced so you need to use \" in there. (this is not necessary if you pass it as boot param by holding shift before boot).
The grub option is supposed to be acpi_osi="Windows 2006". The /etc/default/grub file is sourced so you need to use \" in there. (this is not necessary if you pass it as boot param by holding shift before boot).