OK, je te mets quand même le Xorg.0.log à cette étape :
[ 45.998]
X.Org X Server 1.17.2
Release Date: 2015-06-16
[ 45.999] X Protocol Version 11, Revision 0
[ 45.999] Build Operating System: Linux 3.16.0-4-amd64 i686 Debian
[ 46.000] Current Operating System: Linux kali 4.0.0-kali1-686-pae #1 SMP Debian 4.0.4-1+kali2 (2015-06-03) i686
[ 46.000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.0.0-kali1-686-pae root=UUID=09650290-62ae-43ea-8bb6-30fd101e0574 ro initrd=/install/gtk/initrd.gz quiet
[ 46.000] Build Date: 01 July 2015 05:17:45PM
[ 46.000] xorg-server 2:1.17.2-1 (http://www.debian.org/support)
[ 46.000] Current version of pixman: 0.32.6
[ 46.000] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 46.000] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 46.000] (==) Log file: "/var/log/Xorg.0.log", Time: Sat Sep 5 00:43:42 2015
[ 46.001] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 46.001] (==) No Layout section. Using the first Screen section.
[ 46.001] (==) No screen section available. Using defaults.
[ 46.001] (**) |-->Screen "Default Screen Section" (0)
[ 46.001] (**) | |-->Monitor "<default monitor>"
[ 46.004] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 46.004] (==) Automatically adding devices
[ 46.004] (==) Automatically enabling devices
[ 46.004] (==) Automatically adding GPU devices
[ 46.004] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 46.004] Entry deleted from font path.
[ 46.004] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 46.004] Entry deleted from font path.
[ 46.004] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 46.004] Entry deleted from font path.
[ 46.004] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 46.004] Entry deleted from font path.
[ 46.004] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 46.004] Entry deleted from font path.
[ 46.004] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
built-ins
[ 46.004] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 46.004] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 46.004] (II) Loader magic: 0xb77d3700
[ 46.004] (II) Module ABI versions:
[ 46.004] X.Org ANSI C Emulation: 0.4
[ 46.004] X.Org Video Driver: 19.0
[ 46.004] X.Org XInput driver : 21.0
[ 46.004] X.Org Server Extension : 9.0
[ 46.004] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 46.006] (EE) /dev/dri/card0: failed to set DRM interface version 1.4: Invalid argument
[ 46.009] (--) PCI:*(0:1:0:0) 10de:01d7:1043:1212 rev 161, Mem @ 0xfd000000/16777216, 0xc0000000/268435456, 0xfc000000/16777216, BIOS @ 0x????????/131072
[ 46.010] (II) LoadModule: "glx"
[ 46.010] (II) Loading /usr/lib/xorg/modules/linux/libglx.so
[ 46.081] (II) Module glx: vendor="NVIDIA Corporation"
[ 46.081] compiled for 4.0.2, module version = 1.0.0
[ 46.082] Module class: X.Org Server Extension
[ 46.082] (II) NVIDIA GLX Module 304.125 Mon Dec 1 20:21:57 PST 2014
[ 46.083] (==) Matched nouveau as autoconfigured driver 0
[ 46.083] (==) Matched nv as autoconfigured driver 1
[ 46.083] (==) Matched modesetting as autoconfigured driver 2
[ 46.083] (==) Matched fbdev as autoconfigured driver 3
[ 46.083] (==) Matched vesa as autoconfigured driver 4
[ 46.083] (==) Assigned the driver to the xf86ConfigLayout
[ 46.083] (II) LoadModule: "nouveau"
[ 46.083] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so
[ 46.088] (II) Module nouveau: vendor="X.Org Foundation"
[ 46.088] compiled for 1.17.1, module version = 1.0.11
[ 46.088] Module class: X.Org Video Driver
[ 46.088] ABI class: X.Org Video Driver, version 19.0
[ 46.088] (II) LoadModule: "nv"
[ 46.088] (WW) Warning, couldn't open module nv
[ 46.088] (II) UnloadModule: "nv"
[ 46.088] (II) Unloading nv
[ 46.088] (EE) Failed to load module "nv" (module does not exist, 0)
[ 46.088] (II) LoadModule: "modesetting"
[ 46.088] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 46.089] (II) Module modesetting: vendor="X.Org Foundation"
[ 46.089] compiled for 1.17.2, module version = 1.17.2
[ 46.089] Module class: X.Org Video Driver
[ 46.089] ABI class: X.Org Video Driver, version 19.0
[ 46.089] (II) LoadModule: "fbdev"
[ 46.089] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[ 46.089] (II) Module fbdev: vendor="X.Org Foundation"
[ 46.089] compiled for 1.17.1, module version = 0.4.4
[ 46.089] Module class: X.Org Video Driver
[ 46.089] ABI class: X.Org Video Driver, version 19.0
[ 46.089] (II) LoadModule: "vesa"
[ 46.089] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[ 46.089] (II) Module vesa: vendor="X.Org Foundation"
[ 46.089] compiled for 1.17.1, module version = 2.3.3
[ 46.089] Module class: X.Org Video Driver
[ 46.089] ABI class: X.Org Video Driver, version 19.0
[ 46.089] (II) NOUVEAU driver Date: Thu Aug 28 03:57:48 2014 +0200
[ 46.089] (II) NOUVEAU driver for NVIDIA chipset families :
[ 46.089] RIVA TNT (NV04)
[ 46.089] RIVA TNT2 (NV05)
[ 46.089] GeForce 256 (NV10)
[ 46.089] GeForce 2 (NV11, NV15)
[ 46.090] GeForce 4MX (NV17, NV18)
[ 46.090] GeForce 3 (NV20)
[ 46.090] GeForce 4Ti (NV25, NV28)
[ 46.090] GeForce FX (NV3x)
[ 46.090] GeForce 6 (NV4x)
[ 46.090] GeForce 7 (G7x)
[ 46.090] GeForce 8 (G8x)
[ 46.090] GeForce GTX 200 (NVA0)
[ 46.090] GeForce GTX 400 (NVC0)
[ 46.090] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 46.090] (II) FBDEV: driver for framebuffer: fbdev
[ 46.090] (II) VESA: driver for VESA chipsets: vesa
[ 46.090] (++) using VT number 7
[ 46.100] (EE) [drm] KMS not enabled
[ 46.100] (WW) Falling back to old probe method for modesetting
[ 46.100] (II) Loading sub module "fbdevhw"
[ 46.100] (II) LoadModule: "fbdevhw"
[ 46.100] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 46.101] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 46.101] compiled for 1.17.2, module version = 0.0.2
[ 46.101] ABI class: X.Org Video Driver, version 19.0
[ 46.101] (EE) open /dev/fb0: No such file or directory
[ 46.101] (WW) Falling back to old probe method for fbdev
[ 46.101] (II) Loading sub module "fbdevhw"
[ 46.101] (II) LoadModule: "fbdevhw"
[ 46.101] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 46.101] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 46.101] compiled for 1.17.2, module version = 0.0.2
[ 46.101] ABI class: X.Org Video Driver, version 19.0
[ 46.101] (EE) open /dev/fb0: No such file or directory
[ 46.101] vesa: Ignoring device with a bound kernel driver
[ 46.101] (WW) Falling back to old probe method for vesa
[ 46.103] (EE) Screen 0 deleted because of no matching config section.
[ 46.103] (II) UnloadModule: "modesetting"
[ 46.103] (EE) Screen 0 deleted because of no matching config section.
[ 46.103] (II) UnloadModule: "fbdev"
[ 46.103] (II) UnloadSubModule: "fbdevhw"
[ 46.103] (EE) Screen 0 deleted because of no matching config section.
[ 46.103] (II) UnloadModule: "vesa"
[ 46.103] (EE) Device(s) detected, but none match those in the config file.
[ 46.103] (EE)
Fatal server error:
[ 46.103] (EE) no screens found(EE)
[ 46.103] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 46.103] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 46.103] (EE)
[ 46.105] (EE) Server terminated with error (1). Closing log file.