When I upgrading my Ubuntu Kernel,I saw this errors:

W: Possible missing firmware /lib/firmware/i915/kblXXXXXXXX

It seems there are some firmware files missing,so I decide to fix them.

Someone wrote a script about this problem, but unfortunately it doesn't work for me.But i found great illumination in his work, and finally got it fixed.

Form the errors we know missing files are:

Kaby lake DMC
Kaby lake GUC
Broxton GUC
Broxton HUC
SkyLake HUC

So go to intel offical website grab them down and Install.

SkyLake HUC
https://01.org/zh/node/5098

Broxton HUC
https://01.org/zh/node/5094

Broxton GUC
https://01.org/zh/node/5090

Kaby Lake GUC
https://01.org/zh/node/5093

Kaby lake DMC
https://01.org/zh/node/4211

See more
https://01.org/zh/linuxgraphics/downloads?langredirect=1

Extract the package and install by

sudo ./install.sh

Done!