This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.
Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org. Once this bug is reported upstream, please add the tag: 'kernel-bug- reported-upstream'. [0] https://wiki.ubuntu.com/Bugs/Upstream/kernel ** Changed in: linux (Ubuntu) Status: Incomplete => Triaged -- 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/1372618 Title: Sony vaio keyboard backlight does not work Status in “linux” package in Ubuntu: Triaged Bug description: The keyboard backlight of my SONY VAIO SE15 does not work. This is the corresponding dmesg output [ 21.500543] sony_laptop: handle 0x014b: keyboard backlight setup already done for 0x0143 [ 21.500546] sony_laptop: couldn't set up keyboard backlight function (-16) [ 21.500774] sony_laptop: brightness ignored, must be controlled by ACPI video driver [ 21.500785] sony_laptop: SNC setup done. daniel@daniel-laptop:~$ lsb_release -rd Description: Ubuntu Utopic Unicorn (development branch) Release: 14.10 daniel@daniel-laptop:~$ uname -a Linux daniel-laptop 3.16.0-16-generic #22-Ubuntu SMP Wed Sep 17 18:47:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux --- ApportVersion: 2.14.7-0ubuntu2 Architecture: amd64 CurrentDesktop: Unity DistroRelease: Ubuntu 14.10 InstallationDate: Installed on 2013-11-26 (305 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) Package: linux (not installed) Tags: utopic Uname: Linux 3.17.0-031700rc6-generic x86_64 UnreportableReason: The running kernel is not an Ubuntu kernel UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm autopilot cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1372618/+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
