Public bug reported: Clear 14.04 installation. Then xbacklight was installed (note: xbacklight is used by default in .config/openbox/lubuntu-rc.xml as backlight control command).
$ xbacklight No outputs have backlight property $ xbacklight -dec 10 No outputs have backlight property ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xbacklight 1.1.2-1 Uname: Linux 3.1.10-6-ac100 armv7l ApportVersion: 2.12.7-0ubuntu2 Architecture: armhf CurrentDesktop: LXDE Date: Mon Dec 16 12:08:14 2013 SourcePackage: xbacklight UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: xbacklight (Ubuntu) Importance: Undecided Status: New ** Tags: ac100 apport-bug armhf trusty ** Tags added: ac100 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1261306 Title: xbacklight don't work on Toshiba ac100 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xbacklight/+bug/1261306/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs