I went back to the stock trusty (3.13) kernel, and it works again. It seems that it doesn't work if I apt-get install linux-generic-lts-utopic
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity in Ubuntu. https://bugs.launchpad.net/bugs/1438754 Title: Backlight cannot be adjusted at lock screen Status in Unity: Incomplete Status in unity package in Ubuntu: Incomplete Bug description: This affects 14.04 LTS. I haven't tried any more recent versions. When the screen is locked, it is not possible to use the Fn+Brightness up/down keys. If I am using an external monitor, then I turn down the backlight brightness to zero. I often use my laptop at the office with an external monitor and the backlight turned off. When I come home and resume, the backlight is off and I cannot switch it on to see the login prompt. Steps to reproduce 1. Set backlight brightness to off using Fn+brightness down 2. Lock computer with Super+L 3. Attempt to increase brightness with Fn+brightness up Expected results: Backlight switches on, and Lock/login screen becomes visible Actual results: Backlight remains off and Lock/login screen is not visible This is a regression in 14.04 LTS since the 14.04 release. I can't remember when this started happening, but it's been at least a few weeks. To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1438754/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
