heeeuuu, j’ignore à quoi je devais m’attendre en lançant $ startx – :1 , mais ce n’était probablement pas ce que j’ai vu.
Écran tty2, avec un paquet de messages d’erreurs qui ont défilés, je suis repassé sur OS maître et j’ai monter sdb1, 6,7,8 sur /mnt/chroot et j’ai pu récupérer la sortie console startx – 1 2>
Première fois que je vois un tel message, je n’ai pas compris grand chose … 
:~$ startx -- 1 2>messages_derreur_20092011_18h02.txt
mktemp: impossible de créer le fichier à partir du modèle « /tmp/serverauth.XXXXXXXXXX »: Permission non accordée
xauth: creating new authority file
xauth: unable to link authority file , use -n
use: X [:<display>] [option]
-a # default pointer acceleration (factor)
-ac disable access control restrictions
-audit int set audit trail level
-auth file select authorization file
-br create root window with black background
+bs enable any backing store support
-bs disable any backing store support
-c turns off key-click
c # key-click volume (0-100)
-cc int default color visual class
-nocursor disable the cursor
-core generate core dump on fatal error
-dpi int screen resolution in dots per inch
-dpms disables VESA DPMS monitor control
-deferglyphs [none|all|16] defer loading of [no|all|16-bit] glyphs
-f # bell base (0-100)
-fc string cursor font
-fn string default font name
-fp string default font path
-help prints message with these options
-I ignore all remaining arguments
-ld int limit data space to N Kb
-lf int limit number of open files to N
-ls int limit stack space to N Kb
-logo enable logo in screen saver
nologo disable logo in screen saver
-nolisten string don't listen on protocol
-noreset don't reset after last client exists
-reset reset after last client exists
-p # screen-saver pattern duration (minutes)
-pn accept failure to listen on all ports
-nopn reject failure to listen on all ports
-r turns off auto-repeat
r turns on auto-repeat
-render [default|mono|gray|color] set render color alloc policy
-retro start with classic stipple and cursor
-s # screen-saver timeout (minutes)
-t # default pointer threshold (pixels/t)
-terminate terminate at server reset
-to # connection time out
-tst disable testing extensions
ttyxx server started from init on /dev/ttyxx
v video blanking for screen-saver
-v screen-saver without video blanking
-wm WhenMapped default backing-store
-wr create root window with white background
-maxbigreqsize set maximal bigrequest size
+xinerama Enable XINERAMA extension
-xinerama Disable XINERAMA extension
-dumbSched Disable smart scheduling, enable old behavior
-schedInterval int Set scheduler interval in msec
+extension name Enable extension
-extension name Disable extension
-query host-name contact named host for XDMCP
-broadcast broadcast for XDMCP
-multicast [addr [hops]] IPv6 multicast for XDMCP
-indirect host-name contact named host for indirect XDMCP
-port port-num UDP port number to send messages to
-from local-address specify the local address to connect from
-once Terminate server after one session
-class display-class specify display class to send in manage
-cookie xdm-auth-bits specify the magic cookie for XDMCP
-displayID display-id manufacturer display ID for request
[+-]accessx [ timeout [ timeout_mask [ feedback [ options_mask] ] ] ]
enable/disable accessx key sequences
-ardelay set XKB autorepeat delay
-arinterval set XKB autorepeat interval
Device Dependent Usage
-config file specify a configuration file, relative to the
xorg.conf search path, only root can use absolute
-configdir dir specify a configuration directory, relative to the
xorg.conf.d search path, only root can use absolute
-verbose [n] verbose startup messages
-logverbose [n] verbose log messages
-quiet minimal startup messages
-pixmap24 use 24bpp pixmaps for depth 24
-pixmap32 use 32bpp pixmaps for depth 24
-fbbpp n set bpp for the framebuffer. Default: 8
-depth n set colour depth. Default: 8
-gamma f set gamma value (0.1 < f < 10.0) Default: 1.0
-rgamma f set gamma value for red phase
-ggamma f set gamma value for green phase
-bgamma f set gamma value for blue phase
-weight nnn set RGB weighting at 16 bpp. Default: 565
-layout name specify the ServerLayout section name
-screen name specify the Screen section name
-keyboard name specify the core keyboard InputDevice name
-pointer name specify the core pointer InputDevice name
-nosilk disable Silken Mouse
-flipPixels swap default black/white Pixel values
-disableVidMode disable mode adjustments with xvidtune
-allowNonLocalXvidtune allow xvidtune to be run as a non-local client
-allowMouseOpenFail start server even if the mouse can't be initialized
-ignoreABI make module ABI mismatches non-fatal
-isolateDevice bus_id restrict device resets to bus_id (PCI only)
-version show the server version
-showDefaultModulePath show the server default module path
-showDefaultLibPath show the server default library path
vtXX use the specified VT number
-keeptty don't detach controlling tty (for debugging only)
-novtswitch don't immediately switch to new VT
-sharevts share VTs with another X server
X.Org X Server 1.7.7
Release Date: 2010-05-04
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.37-trunk-amd64 x86_64 Debian
Current Operating System: Linux Debian-pc-1 2.6.32-5-amd64 #1 SMP Fri Sep 9 20:23:16 UTC 2011 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-5-amd64 root=UUID=256700db-871e-4e9e-b1ce-b6974454501e ro quiet
Build Date: 18 February 2011 08:27:24PM
xorg-server 2:1.7.7-13 (Cyril Brulebois <kibi@debian.org>)
Current version of pixman: 0.16.4
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.1.log", Time: Tue Sep 20 18:09:04 2011
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
SELinux: Disabled on system, not enabling in X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Error: Cannot open "/tmp/server-1.xkm" to write keyboard description
> Exiting
(EE) Error compiling keymap (server-1)
(EE) XKB: Couldn't compile keymap
XKB: Failed to compile keymap
Keyboard initialization failed. This could be a missing or incorrect setup of xkeyboard-config.
Fatal server error:
Failed to activate core devices.
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
Please also check the log file at "/var/log/Xorg.1.log" for additional information.
giving up.
xinit: No such file or directory (errno 2): unable to connect to X server
xinit: No such process (errno 3): Server error.De ce fait, je n’ai guère pu consulter le moindre log 
