If it still doesn't work try sudo modprobe sony-acpi . Sometimes the module isn't loaded. Maybe this is your problem.
-- Brightness doesn't work https://bugs.launchpad.net/bugs/95444 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
