I am doing some research on a display dimming problem on my Dell Latitude E6430. Specifically, when using the laptop in a dim/dark environment, the display brightness sometimes varies with a sort of brightness-fluctuation. It can be quite annoying as it is almost like flickering. Perhaps the most frustrating aspect is that it is hard to replicate so troubleshooting can be difficult! 🙁 Other people have similar issues: XPS 15 screen auto brightness – Laptop General Hardware Forum – Laptop – Dell Communityhttp://en.community.dell.com/support-forums/laptop/f/3518/p/19452913/20123083.aspxHi.