cat /home/toto/.xsession-errors_XGL
/etc/X11/gdm/PreSession/Default: Registering your session with wtmp and utmp
/etc/X11/gdm/PreSession/Default: running: /usr/bin/sessreg -a -w /var/log/wtmp -u /var/run/utmp -x "/var/lib/gdm/:0.Xservers" -h "" -l ":0" "toto"
/etc/X11/gdm/Xsession: Beginning session setup...
/etc/X11/gdm/Xsession: Setup done, will execute: /etc/X11/xdm/Xsession default
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running

Fatal server error:
Cannot establish any listening sockets - Make sure an X server isn't already running
*** unable to read X11 cookiexmodmap:  unable to open display ':93'
Error opening display
xset:  unable to open display ":93"
xsetroot:  unable to open display ':93'
xmodmap:  unable to open display ':93'
xmodmap:  unable to open display ':93'
startkde: Starting up...
ksplash: cannot connect to X server :93
kdeinit: Can't connect to the X Server.
kdeinit: Might not terminate at end of session.
kded: cannot connect to X server :93
DCOP aborting call from 'anonymous-7703' to 'kded'
kded: ERROR: Communication problem with kded, it probably crashed.
kcminit_startup: cannot connect to X server :93
ksmserver: cannot connect to X server :93
startkde: Shutting down...
klauncher: Exiting on signal 1
starting artsd!
rpm -qa |grep x11
x11-font-bh-75dpi-1.0.0-4mdv2007.0
x11-server-common-1.1.1-5mdv2007.0
x11-font-cursor-misc-1.0.0-4mdv2007.0
x11-font-bh-lucidatypewriter-75dpi-1.0.0-4mdv2007.0
libx11_6-devel-1.0.3-2mdv2007.0
x11-driver-video-v4l-0.1.1-1mdv2007.0
libx11_6-1.0.3-2mdv2007.0
x11-font-alias-1.0.1-8mdv2007.0
task-x11-2006-3mdv2007.0
x11-font-bitstream-75dpi-1.0.0-4mdv2007.0
xorg-x11-75dpi-fonts-7.1.0-3mdv2007.0
x11-driver-input-keyboard-1.1.0-2mdv2007.0
x11-data-xkbdata-1.0.1-4mdk
x11-server-xorg-1.1.1-5mdv2007.0
x11-font-adobe-75dpi-1.0.0-4mdv2007.0
x11-proto-devel-1.0.3-1mdv2007.0
x11-font-misc-misc-1.0.0-4mdv2007.0
libx11-common-1.0.3-2mdv2007.0
x11-font-adobe-utopia-75dpi-1.0.1-4mdv2007.0
libgtk+-x11-2.0_0-2.10.2-1mdv2007.0
x11-driver-video-nv-1.2.0-1mdv2007.0
dbus-x11-0.92-1mdv2007.0
x11-data-cursor-themes-1.0.1-4mdv2007.0
x11-driver-input-mouse-1.1.1-1mdv2007.0
rpm -qa |grep nvidia
nvidia-8762-7plf2007.0
dkms-nvidia-8762-7plf2007.0