Xserver permission denied ? pour user

/etc/gdm/PreSession/Default: Registering your session with wtmp and utmp
/etc/gdm/PreSession/Default: running: /usr/bin/X11/sessreg -a -w /var/log/wtmp -u /var/run/utmp -x "/var/lib/gdm/:0.Xservers" -h "" -l ":0" "nlav"
/etc/gdm/Xsession: Beginning session setup...
mkdtemp: private socket dir: Permission denied
Xsession: X session started for nlav at ven mai  5 20:56:10 CEST 2006
open: Permission denied
Xsession: X session started for nlav at ven mai  5 21:01:11 CEST 2006
open: Permission denied
Xsession: X session started for root at ven mai  5 21:01:45 CEST 2006
_IceTransTransNoListen: unable to find transport: tcp
_IceTransPTSOpenServer: Unable to link /dev/pts/0 to /dev/X/ICE.9610
_IceTransOpen: transport open failed for pts/ubuntu:
_IceTransMakeAllCOTSServerListeners: failed to open listener for pts
_IceTransISCOpenServer: Protocol is not supported by a ISC connection
_IceTransOpen: transport open failed for isc/ubuntu:
_IceTransMakeAllCOTSServerListeners: failed to open listener for isc
_IceTransSCOOpenServer: Protocol is not supported by a SCO connection
_IceTransOpen: transport open failed for sco/ubuntu:
_IceTransMakeAllCOTSServerListeners: failed to open listener for sco
SESSION_MANAGER=unix/ubuntu:/tmp/.ICE-unix/9610
manager.c/562: setting[0]: bool: autobrowse = 1
manager.c/562: setting[1]: bool: autoburn = 1
manager.c/557: setting[2]: string: autoburn_audio_cd_command = serpentine
manager.c/557: setting[3]: string: autoburn_photo_cd_command = nautilus --no-desktop burn:
manager.c/557: setting[4]: string: autoburn_data_cd_command = nautilus --no-desktop burn:
manager.c/562: setting[5]: bool: autoipod = 0
manager.c/557: setting[6]: string: autoipod_command = 
manager.c/562: setting[7]: bool: automount_drives = 1
manager.c/562: setting[8]: bool: automount_media = 1
manager.c/562: setting[9]: bool: autophoto = 1
manager.c/557: setting[10]: string: autophoto_command = gnome-volume-manager-gthumb %h
manager.c/562: setting[11]: bool: autoplay_cda = 1
manager.c/557: setting[12]: string: autoplay_cda_command = sound-juicer -d %d
manager.c/562: setting[13]: bool: autoplay_dvd = 1
manager.c/557: setting[14]: string: autoplay_dvd_command = totem %d
manager.c/562: setting[15]: bool: autoplay_vcd = 1
manager.c/557: setting[16]: string: autoplay_vcd_command = totem %d
manager.c/562: setting[17]: bool: autoprinter = 0
manager.c/557: setting[18]: string: autoprinter_command = gnome-cups-add hal://%h
manager.c/562: setting[19]: bool: autorun = 0
manager.c/557: setting[20]: string: autorun_path = .autorun:autorun:autorun.sh
manager.c/557: setting[21]: string: eject_command = /usr/bin/eject

(synaptic:9743): Gtk-CRITICAL **: gtk_accel_label_set_accel_closure: assertion `gtk_accel_group_from_accel_closure (accel_closure) != NULL' failed

(synaptic:9743): Gtk-CRITICAL **: gtk_accel_label_set_accel_closure: assertion `gtk_accel_group_from_accel_closure (accel_closure) != NULL' failed
You should really not run firefox through sudo WITHOUT the -H option.
Anyway, I'll do as if you did use the -H option.
plugin_get_value 1
plugin_get_value 2
*** loading the extensions datasource
*** loading the extensions datasource
You should really not run firefox through sudo WITHOUT the -H option.
Anyway, I'll do as if you did use the -H option.

** (gnome-session:9610): WARNING **: Host name lookup failure on localhost.