drivers - HybridGraphics AMD/INTEL doesn't work

Another trouble with HybridGraphics. I didn't find an issue for the moment.
I read https://help.ubuntu.com/community/HybridGraphics but no way. I would like to be as precise as possible to describe the trouble and my searches

Tanks for your help because I'm lost for 10 days.

Computer : Dell Inspiron 5559, Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz

OS : LinuxMint 17.2 based on Ubuntu 14.04

Kernel : 4.2.3

lshw -enable pci -class display
*-display NON-RÉCLAMÉ   
   description: VGA compatible controller

   produit: Intel Corporation
   fabriquant: Intel Corporation
   identifiant matériel: 2
   information bus: pci@0000:00:02.0
   version: 07
   bits: 64 bits
   horloge: 33MHz
   fonctionnalités: vga_controller bus_master cap_list
   configuration: latency=0
   ressources: mémoire:d1000000-d1ffffff mémoire:b0000000-bfffffff portE/S:f000(taille=64)

*-display
   description: Display controller
   produit: Sun XT [Radeon HD 8670A/8670M/8690M]
   fabriquant: Advanced Micro Devices, Inc. [AMD/ATI]
   identifiant matériel: 0
   information bus: pci@0000:01:00.0
   version: 81
   bits: 64 bits
   horloge: 33MHz
   fonctionnalités: cap_list rom

   configuration: driver=radeon latency=0
   ressources: irq:125 mémoire:c0000000-cfffffff mémoire:d0000000-d003ffff portE/S:e000(taille=256) mémoire:d0040000-d005ffff




inxi -G
Graphics:  Card: Intel Device 1916 
       X.Org: 1.15.1 drivers: fbdev,ati,radeon (unloaded: vesa) FAILED: intel Resolution: 1920x1080@77.0hz 
       GLX Renderer: Gallium 0.4 on llvmpipe (LLVM 3.4, 256 bits) GLX Version: 2.1 Mesa 10.1.3

What is the meaning of NON RECLAME ?

Why FAILED appears ?

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Device 1916 (rev 07)

Only Intel appears but not Amd

grep -i switcheroo /boot/config-*
/boot/config-4.2.3-040203-generic:CONFIG_VGA_SWITCHEROO=y

Switcheroo is enabled but /sys/kernel/debug/vgaswitcheroo/switch is missing

Xorg.conf file is missing in /etc/X11/Xsession.d/

At boot, i've seen radeon 0000:01:00.0: VCE init error (-22)

xserver-xorg-video-ati v 1:7.3.0 (open driver) is running instead of fglrx-updates v 2:15.200 or fglrx v 2:15.200 (the computer freezes if i use these 2 last drivers)

grep /drivers/ /var/log/Xorg.0.log
[    52.539] (II) Loading /usr/lib/xorg/modules/drivers/ati_drv.so
[    52.539] (II) Loading /usr/lib/xorg/modules/drivers/radeon_drv.so
[    52.539] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[    52.539] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    52.540] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so

[    52.540] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[    52.540] (II) Loading /usr/lib/xorg/modules/drivers/ati_drv.so
[    52.540] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[    52.540] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    52.541] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[    52.541] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so

Thanks for your Help. I hope that LinuxMint 17.3 will fix this trouble.