Hmm, I can't see why setting an empty ACPI OSI string has effect. acpi_osi="Windows 2006" or later enables some additional code that should make the brightness settings work providing that CDDS has been initialized correctly.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/806032 Title: Fn + F[89] does not work for controlling brightness on Clevo laptops (B7130, W150HRM) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/806032/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs