This bug was fixed in the package unity-settings-daemon - 15.04.1+16.04.20151118.1-0ubuntu1
--------------- unity-settings-daemon (15.04.1+16.04.20151118.1-0ubuntu1) xenial; urgency=medium [ Shih-Yuan Lee (FourDollars) ] * power: On raw backlight types, clamp the value to a minumum (LP: #1381625) gsd-rr: Apply the similar method from power plugin to fix the lowest brightness issue. (LP: #1381625) (LP: #1381625) -- Shih-Yuan Lee <ci-train-...@canonical.com> Wed, 18 Nov 2015 09:36:58 +0000 ** Changed in: unity-settings-daemon (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1381625 Title: Adjust brightness to lowest value caused screen whole black To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1381625/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs