Open bug in lauchpad.net :
"$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"
This warning means that the intel_guc_loader references a firmware, which could not be found on your system. Intel has not yet pushed out the GuC firmware to upstream linux-firmware, as you can see here: https://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/tree/i915.
GuC v9.14 is for Kabylake and GuC v8.7 is for Broxton, so don't mind because I'm pretty confident you don't have them anyway. :D I'm sure that once Intel actually released them, they'll have the driver updated, granted they release Broxton at all.
This is not a wireless bug. Assigning to firstname.lastname@example.org.
Please file new drm/i915 bugs at https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
Anyway, we probably don't care because the hardware is not out yet.
"I have latest linux-firmware on Ubuntu 16.04 and have the same error.
Downloaded files from https://01.org/linuxgraphics/downloads/firmware
so far so good."