Sputnik Kernel PPA is an official Canonical Hardware Enablement Team PPA that provides an updated Linux Kernel which fixes some Dell XPS 13 laptop issues on Ubuntu: Backlight brightness not adjustable by default on Dell XPS 13 laptops: bug #954661 (this fix may also work for other laptops with Intel graphics processor that are having this issue) 'Cypress Trackpad' incorrectly detected as 'ImPS/2 G
![Fix Dell XPS 13 Backlight Brightness Not Adjustable And Trackpad Not Working Properly In Ubuntu 12.04 Or 12.10](https://cdn-ak-scissors.b.st-hatena.com/image/square/ba56692ba456a1937c25bbc831ec27cd299dfa33/height=288;version=1;width=512/http%3A%2F%2F2.bp.blogspot.com%2F-l205Fo_IlRY%2FUCfhWvnm9sI%2FAAAAAAAAJp4%2FNoRF5gHzsw4%2Fw1200-h630-p-k-no-nu%2FUbuntu_XPS13.jpg)