Exists the same issue with build r179 on Arale phone. When "Adjust automatically" is on, manually adjust brightness does not work.
$ system-image-cli -i current build number: 179 device name: m75 channel: ubuntu-touch/vivid-proposed last update: 2015-04-21 18:09:15 version version: 179 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1314678 Title: "Display brightness" adjustable but does nothing when "Adjust automatically" is on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/powerd/+bug/1314678/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs