Same problem on custom build notebook with Intel 7 Series chipset.
GRUB_CMDLINE_LINUX="acpi_osi="
allows me to change with Fn keys but not with system settings slider. No HUD interface either.
Same problem on custom build notebook with Intel 7 Series chipset.
GRUB_CMDLINE_ LINUX=" acpi_osi= "
allows me to change with Fn keys but not with system settings slider. No HUD interface either.