kernel-packages team mailing list archive

[Shih-Yuan Lee <1381625@xxxxxxxxxxxxxxxxxx>]

Since Linux kernel v3.18-rc1, it contains

commit e6755fb78e8f20ecadf2a4080084121336624ad9
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Tue Aug 12 17:11:42 2014 +0300

    drm/i915: switch off backlight for backlight class 0 brightness

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https://bugs.launchpad.net/bugs/1381625

Title:
  Adjust brightness to lowest value caused screen whole black

Status in HWE Next:
  Confirmed
Status in Unity Settings Daemon:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed
Status in unity-settings-daemon package in Ubuntu:
  Won't Fix

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

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