There is a better fix queued up for the upstream 4.1 kernel. It consists of these two patches:
acpi: video: Allow forcing native backlight on non win8 machines acpi: video: Add enable native backlight quirk for Lenovo Ideapad Z570 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1331442 Title: Screen Brightness keys do not work on Lenovo IdeaPad Z570 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1331442/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
