I confirm the same issue with a Lenovo W510. A similar problem exists with Mavrick 10.10. But with Mavrick I can switch to a console (using Ctrl+Alt+f5) and reduce the brightness using the function keys then. Whereas this trick doesn't work with Natty.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/773710 Title: [Lenovo T420s] Brightness keys make the indicator work, but don't actually dim or brighten the screen -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
