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 Desktop Packages, which is subscribed to unity-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1381625 Title: Adjust brightness to lowest value caused screen whole black Status in HWE Next: Confirmed Status in OEM Priority Project: In Progress Status in OEM Priority Project trusty series: Confirmed Status in Unity Settings Daemon: Fix Released Status in unity-settings-daemon package in Ubuntu: Fix Released Status in unity-settings-daemon source package in Trusty: Confirmed Bug description: [Impact] When adjusting screen brightness to lowest value, it turns screen backlight off. [Test Case] 1. Install Image 2. Press System's brightness hotkey to adjust the brightness level to the lowest or 3. Go to System "Settings" -> "Brightness & Lock" to adjust brightness level to the lowest 4. Check if the screen display still has backlight Expected results: There is still screen backlight Actual results: Sceen backlight is turned off To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1381625/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp