are you guys sure you are using the proper double-quotes? cause if you are just copy-pasting the whole line, the quotes are different in here. just copy-paste: acpi_backlight=vendor
and put the quotations yourself.. dont copy them from here! :)
are you guys sure you are using the proper double-quotes? cause if you are just copy-pasting the whole line, the quotes are different in here. just copy-paste: vendor
acpi_backlight=
and put the quotations yourself.. dont copy them from here! :)