This warning means that the driver references the firmware but that it isn't installed. Intel has not yet pushed out this firmware to upstream linux-firmware, once they have done so it will make it's way into Ubuntu. I'll also point out that we don't officially support any 4.8-based kernels yet, and when running early -rc kernels you're likely to hit some snags.
Marking as invalid on the basis of using a non-supported kernel and because the firmware is not upstream. ** Changed in: linux-firmware (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1611124 Title: W: Possible missing firmware /lib/firmware/i915/kbl_guc_ver9_14.bin for module i915 Status in linux-firmware package in Ubuntu: Invalid Bug description: $sudo dpkg -i linux-image-4.8.0-040800rc1-lowlatency [...] update-initramfs: Generating /boot/initrd.img-4.8.0-040800rc1-lowlatency W: Possible missing firmware /lib/firmware/i915/kbl_guc_ver9_14.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_guc_ver8_7.bin for module i915 ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: linux-firmware 1.159 Uname: Linux 4.8.0-040800rc1-lowlatency x86_64 ApportVersion: 2.20.3-0ubuntu5 Architecture: amd64 Date: Mon Aug 8 17:50:38 2016 Dependencies: InstallationDate: Installed on 2015-07-26 (379 days ago) InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20150723) PackageArchitecture: all SourcePackage: linux-firmware UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1611124/+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