Install and update to latest Intel driver in Ubuntu (without PPAs)

If you are running a Laptop with integrated Intel graphics, it's pretty easy to update your drivers to the latest stable version, without running a PPA. You can easily build and install the driver on your own:

1. Get the necessary dependencies:
   
   sudo apt-get build-dep xserver-xorg-video-intel
   
   
2. Download the driver version you want to install (either stable tagged or git) from:
   
   http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/
   
   
3. Now (extract the archive and) open a terminal in the folder
4. Set the x64 library path:
   
   export PKG_CONFIG_PATH=/usr/lib/x86_64-linux-gnu/pkgconfig:$PKG_CONFIG_PATH
   
   This is necessary to otherwise the configuration step will fail.
   
   
5. Configure everything to set install path to /usr:
   
   ./autogen.sh --prefix=/usr
   
   
6. Build the driver:
   
   make
   
   
7. Install the newly build driver to /usr:
   
   sudo make install
   
   
8. Reboot and check whether new driver is installed and looking into:
   
   /var/log/Xorg.0.log
   
   Search for 'LoadModule: "intel"' (without ''). Three lines below you find your actual running driver version.

Beware: This will overwrite your actual installed driver. To revert to your previous driver (in case of problems), just reinstall it via: sudo apt-get install --reinstall xserver-xorg-video-intel