Install Latest Intel GPU Driver on Debian Jessie – Activate “SNA” Hardware Acceleration

Usually, after installing Debian Jessie on your computer running an Intel processor with integrated GPU, the first question that comes in mind is whether hardware acceleration is activated or not. Next, you might want to ensure that you are running the latest drivers available.

Honestly, the simple answer for first question is that; Debian Linux desktop distributions will originally come packed with hardware acceleration configured by default during installation for Intel processors just in case you would rely on the integrated GPU.

However, what we are going to cover in this article is upgrading that outdated driver to latest version to maximize performance, and how to solve tearing issues, after we force the use of the bleeding edge “SNA” on X11 instead of “UXA” as the default Hardware Acceleration method.

How to Install Latest Intel GPU Driver

You can follow same instructions below to either install latest Intel GPU driver from scratch or simply to perform an upgrade to the currently outdated driver package, the general idea is pulling the bleeding edge version of xserver-xorg-video-intel package from Debian jessie/backports repository branch.

Add “jessie/backports” Branch to APT Sources

Basically, one easy way to achieve that is by issuing this command into the terminal, like this:
sudo echo "deb jessie-backports main contrib non-free" >> /etc/apt/sources.list

Install Backported “xserver-xorg-video-intel” Package

Now, just install the package using apt-get utility from terminal.
sudo apt-get -t jessie-backports install "xserver-xorg-video-intel"
Note that if you already have an older version then it will just upgrade it to the build corresponding to the latest package available on jessie/backports automatically.

How to Activate “SNA” Hardware Acceleration

Well, the default behavior after you install the latest driver is that it will automatically choose the suitable hardware acceleration method according to your processor architecture.

For instance, starting from Intel Haswell which is the "fourth-generation core" successor to the Ivy Bridge architecture, without configuring anything it will default to “SNA” settings. However, sometimes I do not trust everything to go as intended.

Besides, we need to force enabling "TearFree" "true" option to prevent graphics tearing during either 3D OpenGL rendering or direct window moving/scrolling actions. So, according to this we must to create an xorg.conf file to manually define our own desired options, anyway.

Create “xorg.conf” File with our Settings

You need to create the configuration file exactly at this path /etc/X11/xorg.conf so execute your preferred text editor from terminal to that location, we will use nano as an example:
sudo nano /etc/X11/xorg.conf
Note that if you happen to already have this file created somehow, it will just attempt to edit it otherwise it will automatically create it.

Configure X11 with Intel Graphics

Now, just input the following content, into the text editor and save it.
Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod" "sna"
   Option      "TearFree" "true"
If you are using an old Intel processor that doesn't support “SNA” consider changing the option marked above with white color to "AccelMethod" "uxa" instead to avoid any issues.

Reboot System

That's it for now, restart your system to take effect then proceed to the next step just in case you want to confirm that GPU Hardware Acceleration and everything is working as intended.

How to Confirm Working GPU Hardware Acceleration

I have prepared a simple command with an expected output so that we can confirm everything is going our way, in terminal issue this command:
cat /var/log/Xorg.0.log | grep SNA && cat /var/log/Xorg.0.log | grep DRI
You should expect to receive an output similar to this in my case:
[    12.953] (II) intel(0): SNA compiled: xserver-xorg-video-intel 2:2.99.917+git20161105-1~bpo8+1 (Vincent Cheng )
[    12.953] (II) intel(0): SNA compiled for use with valgrind
[    13.033] (II) intel(0): SNA initialized with Haswell (gen7.5, gt1) backend
[    13.044] (II) intel(0): [DRI2] Setup complete
[    13.044] (II) intel(0): [DRI2]   DRI driver: i965
[    13.044] (II) intel(0): [DRI2]   VDPAU driver: va_gl
[    13.044] (II) intel(0): direct rendering: DRI2 enabled
[    13.507] (II) GLX: Initialized DRI2 GL provider for screen 0
Last but not least, I will be writing two other articles related to this subject this week, as we know that currently browsers available for Linux distributions like FireFox and Chrome aren't configured correctly to make use of Intel GPU Hardware Acceleration by default, so we'll be solving that.
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