This is still a problem on the X1 carbon even with the latest BIOS update (v2.5) running Ubuntu 13.04. Please make sure it gets addressed in 13.04. I am happy to test.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1121951 Title: Lenovo X1 Carbon: Backlight brightness keys don't work any more To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1121951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
