To all those wondering about backlight in Precise and Quantal, if you switch your BIOS mode to UEFI, and reinstall Ubuntu in UEFI mode, it will fix the brightness issue. You can use your function keys out of the box, and they will change the brightness accordingly.
The only issue is, with the fresh Precise installation, you will need to update your kernel through the Updater, otherwise your brightness will be stuck on the lowest one. After an update, all issues gone, and you can use your laptop as is :D -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/954661 Title: backlight brightness not adjustable by default on Dell XPS 13 To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/954661/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs