I cannot control brightness with my current setup. However i remember having tested brightness with a clean install on another disk and brightness control worked after adding
Option "RegistryDwords" "EnableBrightnessControl=1" in xorg.conf I am using the nvidia proprietary drivers and running in Discrete Graphics mode. I cannot verify this right now, since i dont want to restart X, but will try to verify later on. Would be worth a try anyway -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/776999 Title: [Lenovo W520] laptop freezes on ACPI-related actions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776999/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
