"W: Possible missing firmware for module i915_bpo" when updating initramfs
The driver package is somewhat lagging the kernel. In my case the missing firmware doesn't matter because I don't have a SkyLake processor, but in your case it might matter. You can get the newer firmware from here.
EDIT 1: Note the link changed, but readers should still be able to find what they need in the new link, although sometimes it can be difficult to know exactly what your are looking for.
EDIT 2: This answer should be applicable to some other new firmware requirements that have come along since this answer was originally written. For example:
W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin for module i915
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
EDIT 3: For users that use git, this answer also works well.
May 20, 2019 Update
To answer your question you don't need to update drivers for a processor you aren't running but it is nice to see the warnings disappear when you do.
Today I received these warning:
update-initramfs: Generating /boot/initrd.img-5.0.1-050001-generic
W: Possible missing firmware /lib/firmware/i915/skl_dmc_ver1_27.bin for module i915
W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_04.bin for module i915
W: Possible missing firmware /lib/firmware/i915/cnl_dmc_ver1_07.bin for module i915
W: Possible missing firmware /lib/firmware/i915/icl_dmc_ver1_07.bin for module i915
W: Possible missing firmware /lib/firmware/i915/kbl_guc_ver9_39.bin for module i915
W: Possible missing firmware /lib/firmware/i915/bxt_guc_ver9_29.bin for module i915
W: Possible missing firmware /lib/firmware/i915/skl_guc_ver9_33.bin for module i915
I downloaded the blobs (described in next section) and then used:
$ sudo cp ~/Downloads/*.bin /lib/firmware/i915/
$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-5.0.1-050001-generic
Now my Sky Lake (skl) drivers are up to date and I can try out latest kernel parameters recommended on the internet. Warning messages for future processors Kaby Lake (kbl), Cannon Lake (cnl) and Ice Lake (icl) are gone making life less stressful.
May 26, 2018 Update
Minor revision August 6, 2018.
New download screen of "blobs"
Recently Intel has created a new download page and new web page layout:
The download files are now called firmware blobs which is new-speak for firmware drivers. It stands for Binary Large OBject (BLOB).
Drivers are sorted by processor:
bxtBroxton, Canceled in 2016, successor to Cherry Trail processorskblKabylake, 7th generation, eg i7-7700sklSkylake, 6th generation, eg i7-6700
Then drivers are organized by subgroup (full explanation here):
- GUC - GuC is designed to perform graphics workload scheduling on the various graphics parallel engines.
- DMC - DMC provides additional graphics low-power idle states.
- HUC - HuC is designed to offload some of the media functions from the CPU to GPU.
Match error message to driver needed
Compare the error message you are receiving by update-initramfs or update-grub to find the missing driver. In your example the message was "/lib/firmware/i915/kbl_guc_ver9_14.bin" so you are missing the Kabylake GuC called: kbl_guc_ver9_14.bin in the web page shown above. You don't want the newer one: kbl_guc_ver9_39.bin
Download driver needed
There is no more installation script as in past versions. Simply highlight the missing driver (blob) and click on it. This screen appears:
Initially you only see the "hex dump" but after clicking the link titled plain a download window appears as illustrated above.
Click "Save File"
Install driver with simple sudo cp (copy command)
After downloading, installation is a simple sudo cp (copy command) and there are no complicated tar commands, or ./script_name installation steps.
Quick Install
cd ~/Downloads
sudo cp kbl_guc_ver9_14.bin /lib/firmware/i915
sudo cp bxt_guc_ver8_7.bin /lib/firmware/i915
IMPORTANT: Replace kbl_guc_ver9_14.bin and bxt_guc_ver8_7.bin above with the missing driver names you downloaded.
VOILA! New driver is installed. Much simpler than previous installation methods for missing Intel i915 drivers!
TL;DR Exploratory Installation
I already had the driver installed. This lengthy installation method gives you an idea of before and after effects of copying the BLOB:
$ sudo updatedb
$ llocate kbl_guc_ver9_14.bin
ACCESS OWNER GROUP SIZE MODIFIED NAME (updatdb last ran: 2018-05-26 12:07:57)
-rw-rw-r-- rick rick 142656 2018-05-26 /home/rick/Downloads/kbl_guc_ver9_14.bin
-rw-rw-r-- rick rick 142656 2017-02-24 /home/rick/Downloads/kbl_guc_ver9_14/kbl_guc_ver9_14.bin
-rw-r--r-- root root 142656 2017-10-26 /lib/firmware/i915/kbl_guc_ver9_14.bin
$ diff /home/rick/Downloads/kbl_guc_ver9_14/kbl_guc_ver9_14.bin /lib/firmware/i915/kbl_guc_ver9_14.bin
# Blank line appears here signifying no differences from previous version
$ sudo cp /home/rick/Downloads/kbl_guc_ver9_14/kbl_guc_ver9_14.bin /lib/firmware/i915
$ llocate kbl_guc_ver9_14.bin
ACCESS OWNER GROUP SIZE MODIFIED NAME (updatdb last ran: 2018-05-26 12:07:57)
-rw-rw-r-- rick rick 142656 2018-05-26 /home/rick/Downloads/kbl_guc_ver9_14.bin
-rw-rw-r-- rick rick 142656 2017-02-24 /home/rick/Downloads/kbl_guc_ver9_14/kbl_guc_ver9_14.bin
-rw-r--r-- root root 142656 2018-05-26 /lib/firmware/i915/kbl_guc_ver9_14.bin
Use the locate command below in place of llocate.
February 14, 2017 - Intel has released drivers
As per this bug report today (W: Possible missing firmware /lib/firmware/i915/kbl_guc_ver9_14.bin for module i915) Intel has released the required Kabylake and Broxton drivers on their (https://01.org/linuxgraphics/downloads/firmware) web page:
Download the missing drivers for Kabylake (GuC - Ver 9.14) and (DMC - Ver 1.01) and Broxton (GuC - Ver 8.7). These are in .tar.gz and .tar.bz2 format.
Install drivers in "tar" format
Although you can run the install.sh scripts these instructions are the easiest.
Change to the download directory and verify files are there:
:~$ cd Downloads
:~/Downloads$ ll *tar*
-rw-rw-r-- 1 rick rick 69329 Feb 14 21:05 bxtgucver87.tar.gz
-rw-rw-r-- 1 rick rick 4338 Feb 14 21:06 kbldmcver101.tar.bz2
-rw-rw-r-- 1 rick rick 70402 Feb 14 21:06 kblgucver914.tar.gz
Extract the compressed tar files:
:~/Downloads$ tar -zxvf bxtgucver87.tar.gz
firmware/bxt/guc/bxt_guc_ver8_7/
firmware/bxt/guc/bxt_guc_ver8_7/install.sh
firmware/bxt/guc/bxt_guc_ver8_7/ReleaseNotes.txt
firmware/bxt/guc/bxt_guc_ver8_7/bxt_guc_ver8_7.bin
:~/Downloads$ tar -xjvf kbldmcver101.tar.bz2
kbl_dmc_ver1_01/
kbl_dmc_ver1_01/kbl_dmc_ver1_01.bin
kbl_dmc_ver1_01/install.sh
kbl_dmc_ver1_01/ReleaseNotes.txt
:~/Downloads$ tar -zxvf kblgucver914.tar.gz
firmware/kbl/guc/kbl_guc_ver9_14/
firmware/kbl/guc/kbl_guc_ver9_14/install.sh
firmware/kbl/guc/kbl_guc_ver9_14/kbl_guc_ver9_14.bin
firmware/kbl/guc/kbl_guc_ver9_14/ReleaseNotes.txt
Copy the files and update initramfs
:~/Downloads$ sudo cp -t /lib/firmware/i915/ firmware/bxt/guc/bxt_guc_ver8_7/bxt_guc_ver8_7.bin kbl_dmc_ver1_01/kbl_dmc_ver1_01.bin firmware/kbl/guc/kbl_guc_ver9_14/kbl_guc_ver9_14.bin
:~/Downloads$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.9.9-040909-generic
Notice the error (warning) messages are gone!
Remove work files
:~/Downloads$ rm -r firmware kbl_dmc_ver1_01 *.tar.*
Historical (Original) Post for reference
I've had two warning messages on missing i915 drivers for Kernel's 4.6.3, 4.7.1, 4.7.2, 4.7.3 and 4.7.5. I've ignored them and things have been fine with my HD4000 Intel Integrated Graphics. I wish the same thing could be said about Nvidia and Nouvaeu.
As one answer in your link stated you can go to Intel's website to get most up-to-date Linux Graphics drivers at: intel-linux-graphics-firmwares. However when I read that site a few weeks ago I was concerned with all the possible things that can go wrong under different scenarios so I opted out.
Did you install 4.8 release candidate 6 from September 24th? That's the most current in Ubuntu I believe. You don't have to answer but I'm curious why you went with 4.8 instead of 4.7.5, ie what the differences are you need to fix things.
Edit - October 19, 2016
Now using kernel version 4.8.1 (real version and not release candidate) for over a week and things are working nicely. This is under Ubuntu 16.04 though. Ubuntu 16.10 was released October 13th and it is using Kernel version 4.8.0 I believe.
It's not my plan to keep updating this answer but I wanted to lay to rest the inference that 4.8 release candidates might have problems. The real version does not.
Edit - February 2, 2017
Now running Kernel version 4.9.5 mainline version which at this time Ubuntu 16.04 has updated it's kernel to 4.4.0-59. Intel changed it's link for Intel Graphics for Linux drivers and I updated the new link above.
Questions still remain about the warning messages generated by sudo update-initramfs -u when Kernel version > 4.8 (Ubuntu 16.10 and Ubuntu 17.04):
W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin for module i915
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
As stated in the bug report (bugs.launchpad.net - linux firmware bug) the drivers simply do not exist and will not until a future chip called "kaby lake" is released.
Make the warning messages go away
To make the warning message go away I did the following:
$ sudo cp assembly/hello /lib/firmware/i915/kbl_dmc_ver1_01.bin
$ sudo cp assembly/hello /lib/firmware/i915/kbl_guc_ver9_14.bin
$ sudo cp assembly/hello /lib/firmware/i915/bxt_guc_ver8_7.bin
$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.9.5-040905-generic
Voila! No more warning messages.
The program "hello" is a 504 byte assembler program that says "Hello World!". You can copy any small executable to the firmware binaries given in the error messages. When Intel eventually releases them the software updater will replace them with the real versions.
How to navigate Intel Graphics for Linux website
It was asked via comments how to navigate within the the new Intel website (01.org - Linux Graphics Downloads) which presents this screen:
Type Ubuntu 16.04 into the search field and click the Filter button.
For Ubuntu 16.10 select the first result. In our case Ubuntu 16.04 select the second result INTEL GRAPHICS UPDATE TOOL FOR LINUX* OS V2.0.2 and this screen appears:
In my case I selected Ubuntu 16.04 64-bit which downloaded the file intel-graphics-update-tool_2.0.2_amd64.deb to my ~/Downloads directory.
The next step is to open the terminal and use:
cd Downloads
sudo dpkg -i intel*.deb
NOTE: Intel uses the ancients ttf font and your installation will fail if it's not on your system. At this point you need to use:
sudo apt -f install
sudo apt update
sudo apt upgrade
Now you can run the Intel Graphics for Linux Updater tool as this screen shows:
Add Intel signatures for Ubuntu
During apt-get update you can see warning / error messages like this:
W: GPG error: https://download.01.org/gfx/ubuntu/16.04/main xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 56A3DEF863961D39
E: The repository 'https://download.01.org/gfx/ubuntu/16.04/main xenial InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
You'll need to add Intel's signatures using:
wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-KEY-ilg-4 -O - | \
sudo apt-key add -
Then update in Ubuntu:
sudo apt update
sudo apt upgrade
I also have faced a similar problem because I've updated the kernel from the Ubuntu Gnome 16.04 "Software" app (native package manager) and it crashed while updating.
So, I was barred to boot Ubuntu again because the linux-image was unsuccessfully generated.
To solve it from that point I did the following:
- Reboot linux and right after motherboard screen press
Shiftto enter into grub menu; - Select your previous linux version from menu. In my case
*4.4.0-21-genericand pressEnter; - Once Ubuntu is up again, uninstall the broken linux-image. In my case the
*4.4.0-59-generic(I've used Synaptic package manager for it); - Download and install the missing firmware from Intel page (same as Doug Smythies). In my case, I got the
KabyLake kbl DMC - Ver 1.01; - And finally, install again the linux kernel
*4.4.0-59-generic(in my case) or justlinux-genericfor the latest complete generic Linux kernel.
Success! Kernel is up-to-date and all firmwares working fine!
Best regards!