Debian Configuration :: DRI 3 Doesn't Work With IGP - Missing Packages?

So, as per Arch Linux's wiki, I tried to make some optimisations to the intel driver through setting it up in Xorg.conf (or as advised by that wiki article, in '/etc/X11/xorg.conf.d/20-intel.conf' ), but I've ran into trouble enabling DRI3. Here's my current config file:

Code: Select allSection "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod"  "SNA"
   Option      "DRI"    "3"
   Option      "TearFree"    "true"
EndSection

So far everything works fine, I haven't seen any noticeable tearing, nor did I had any problems with any graphics-intensive programs I run, but there's a slight problem with the DRI3 part as indicated by Xorg's logs:

Code: Select all[    26.556] (II) Loading sub module "dri2"
[    26.556] (II) LoadModule: "dri2"
[    26.556] (II) Module "dri2" already built-in
[    26.556] (==) Depth 24 pixmap format is 32 bpp
[    26.616] (II) intel(0): SNA initialized with Haswell (gen7.5, gt2) backend
[    26.616] (==) intel(0): Backing store enabled

[Code] ....

First of all it still mentions the DRI2 driver, is this supposed to happen, or did something go wrong? Also it complains that it cannot find a file, which I can't figure out which package it belongs to, and taking a quick search around the interwebs hasn't produced anything useful...

The IGP is the CPU, which is actually a i5-4460... which according to Wikipedia it has a HD Graphics 4600 GPU.