I have just tested on T430s and the kernel only partially fixed the issue. Function keys do work fine but there are 2 problems: 1. Notifications are not updated properly. They are showing the lowest value all the time 2. Brightness in system settings has no effect.
appending acpi_osi="!Windows 2012" to the kernel CLI resolves the issue completely. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1098216 Title: Regression in brightness control on Lenovo Thinkpad X230 and X1 Carbon To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1098216/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs