Error: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin for module i915

DMC provides additional graphics low-power idle states. It provides capability to save and restore display registers across these low-power states independently from the OS/Kernel.

Fix: Install the missing firmware.
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Download DMC – Ver 1.01

tar xvf kbldmcver101.tar.bz

Open install.sh and check that KERNEL_FIRMWARE_DIR=”/lib/firmware” (It seems to be appropriate).

cd kbl_dmc_ver1_01/
gedit install.sh

Install it:

sudo bash ./install.sh

Credits: askubuntu