fglrx (not installed): fglrx kernel module failed to build

[CADOZ]

Hello... again.
After a durty way (install fglrx, uninstal.... many times to follow a lot of tutos !); ther's still no way to instal the last drivers for my Ati HD 4670 (13.1 legacy from AMD). Last try (which "failed" me there...) I've followed these steps :

sudo sh /usr/share/ati/fglrx-uninstall.sh
sudo apt-get remove --purge fglrx fglrx_* fglrx-amdcccle* fglrx-dev*
sudo rm /etc/X11/xorg.conf
apt-get install --reinstall libgl1-mesa-glx:amd64 libgl1-mesa-glx:i386
sudo dpkg-reconfigure xserver-xorg
sudo reboot
mkdir ~/catalyst13.1/
cd ~/catalyst13.1/
Downloaded the appropriate driver for my machine here from the AMD/ATI Website and move it in ~/catalyst13.1/ : amd-driver-installer-catalyst-13.1-legacy-linux-x86.x86_64.run
chmod +x amd-driver-installer-catalyst-13.1-legacy-linux-x86.x86_64.run
./amd-driver-installer-catalyst-13.1-legacy-linux-x86.x86_64.run --extract driver
cd ~/catalyst13.1/driver/common/lib/modules/fglrx/build_mod/
cd ~/catalyst13.1/driver/
./ati-installer.sh 8.970 --buildpkg Ubuntu/trusty
cd ~/catalyst13.1/
sudo dpkg -i fglrx*.deb
sudo amdconfig --initial -f
sudo reboot

And then the bad login intead of the automatic start of my session, with 2 or 3 error messages blinking too quickly to be usable... and login again... and again... no other way out for me than restart, recovery, repair and 2 reboot... then

fglrxinfo return :
X Error of failed request: BadRequest (invalid request code or no such operation)
  Major opcode of failed request: 155 (GLX)
  Minor opcode of failed request: 19 (X_GLXQueryServerString)
  Serial number of failed request: 12
  Current serial number in output stream: 12

It done almost the same each time I'v tryed it since I start this "messi travel"... You see what I'mean ? (cause I don't !!).
Dunnow if i'm usefull, but Thank's for the job and any ideas to fix it...

Spec of the Hard (a "gift") :
Dell XPS1645 : core i7 1,6ghz, 4gig Ram, [AMD/ATI] RV730/M96-XT [Mobility Radeon HD 4670]1go... What else ?

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: fglrx 2:13.350.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-34.60-lowlatency 3.13.11.4
Uname: Linux 3.13.0-34-lowlatency x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
DKMSBuildLog:
 DKMS make.log for fglrx-8.970 for kernel 3.13.0-34-lowlatency (x86_64)
 samedi 23 août 2014, 22:47:52 (UTC+0200)
 AMD kernel module generator version 2.1
 kernel includes at /lib/modules/3.13.0-34-lowlatency/build/include not found or incomplete
 file: /lib/modules/3.13.0-34-lowlatency/build/include/linux/version.h
DKMSKernelVersion: 3.13.0-34-lowlatency
Date: Sat Aug 23 22:47:56 2014
InstallationDate: Installed on 2014-08-20 (3 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.1)
PackageVersion: (not installed)
SourcePackage: fglrx-installer
Title: fglrx (not installed): fglrx kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel Letzeisen (dtl131)]

You cannot install the Catalyst legacy driver on Ubuntu 14.04.x/Trusty. It does not support the kernel and Xserver version in Trusty.
https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1058040/comments/66