Got the following warning while updating udev on my machine. I use Ubuntu 16.04 LTS.

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

STEP 1

Check if the firmware (package) exists in the provided directory or not. This step isn’t required, but anyway -

$ cd /lib/firmware/i915

$ ls | grep kbl_guc

STEP 2

  • Search for all the missing firmware from here.

  • Click on plain to download the blob of each firmware. It’s going to be something like this -

blob: e42b8c5412c09a59ab7fe16861275bbb0f20e54c (plain)

STEP 3

Let’s suppose you saved the files on Desktop. Now -

$ cd Desktop

$ sudo mv *.bin /lib/firmware/i915/

STEP 4

The firmware warning appeared after update-initramfs: deferring update (trigger activated) while Generating /boot/initrd.img-4.15.0-76-generic, which means the firmware (module) depends upon update-initramfs. So, let’s update it, and reboot -

$ sudo update-initramfs -u

$ reboot

That’s it. This should fix the warnings.