@Matthias probably you should read the patch description carefully. I've changed this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor thinkpad_acpi.brightness_enable=0" in /etc/default/grub.
After update it works on my Lenovo Z360. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/568611 Title: Screen brightness control fails on Dell Studio 1558 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
