The fix in the upstream 3.14-rc2 kernel has been removed and replaced with a better one in the upstream 3.14-rc4 kernel by these two commits:
commit bd8ba20597f0cfef3ef65c3fd2aa92ab23d4c8e1 - ACPI / video: Filter the _BCL table for duplicate brightness values commit 0e9f81d3b7cd0649a3bc437391b6a0650f98f844 - ACPI / video: Add systems that should favour native backlight interface and this one: author Rafael J. Wysocki committer Rafael J. Wysocki commit a6940190ac15c361862a1a8f50a2072db7184749 tree c73be15646c6418f77a94fede3afc7eabd589dd6 parent 0e9f81d3b7cd0649a3bc437391b6a0650f98f844 Revert "ACPI: Blacklist Win8 OSI for some HP laptop 2013 models" This reverts commit 2d4054d84224 (ACPI: Blacklist Win8 OSI for some HP laptop 2013 models) that is not necessary any more after previous commit 1811fcb029fa (ACPI / video: Add systems that should favour native backlight interface). Requested-by: Takashi Iwai Tested-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki The first one has been cc'd to the stable kernel series. A PPA of the 3.14-rc4 kernel is available at http://kernel.ubuntu.com/~kernel- ppa/mainline/ and instructions on how to install and uninstall it are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1257766 Title: can not reduce brightness on HP ZBook 15 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1257766/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
