Issue can be reproduced with below builds, please refer the results below: [Tested images for verification] Stock 14.04.1 [ubuntu-14.04.1-desktop-amd64.iso] -> Failed Stock 14.10 [ubuntu-14.10-desktop-amd64.iso] -> Failed 15.04 daily build @1/13 [vivid-desktop-amd64.iso] -> Failed
[Test Case / Reproduce Steps] 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 [Other Info] 1. For 14.04, due to bug#1332379, (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1332379), the brightness cannot be adjusted after the system freshly installed. After adding kernel parameter "video.use_native_backlight=1" it then can work. 2. Test unit: Dell Haswell ULT system -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1381625 Title: Adjust brightness to lowest value caused screen whole black Status in OEM Priority Project: New Status in linux package in Ubuntu: Incomplete Bug description: When using F2 hotkey to adjust screen brightness to lowest value, it truns screen backlight off. Steps: 1. Press F2 to adjust screen brightness to lowest value 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/oem-priority/+bug/1381625/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
