Before performing the reverse bisect process I thought to ask directly in the linux-acpi mailing list which was the patch (or the set of patches) that have fixed the acpi/backlight issue .
This is the answer: (original message http://marc.info/?l=linux-acpi&m=140429106012604&w=2) -------------------------------- "I think you will need at least: commit fbc9fe1b4f222a7c575e3bd8e9defe59c6190a04 Author: Aaron Lu <aaron...@intel.com> Date: Fri Oct 11 21:27:45 2013 +0800 ACPI / video: Do not register backlight if win8 and native interface exists commit 0e9f81d3b7cd0649a3bc437391b6a0650f98f844 Author: Aaron Lu <aaron...@intel.com> Date: Tue Feb 18 13:54:20 2014 +0800 ACPI / video: Add systems that should favour native backlight interface commit 751109aad5834375ca9ed0dcfcd85a00cbf872b5 Author: Rafael J. Wysocki <rafael.j.wyso...@intel.com> Date: Thu Jun 5 22:47:35 2014 +0200 ACPI / video: Change the default for video.use_native_backlight to 1 Maybe others, you will need to figure them out." -------------------------------- I hope this will be helpful. Also, the first good working kernel is v3.16rc1. As long as I understand, instead of using a blacklist they have changed the default setup for the machines that are supporting Windows 8 with intel drivers. It seems that most of them don't use acpi. (More details starting from here http://lists.freedesktop.org/archives/intel- gfx/2013-October/034212.html) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1318299 Title: [Fujitsu Lifebook A512] Brightness hot keys Fn+F6/Fn+F7 don't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1318299/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
