/etc/gdm/Xsession: Beginning session setup...
Setting IM through im-switch for locale=en_US.
Start IM through /etc/X11/xinit/xinput.d/all_ALL linked to /etc/X11/xinit/xinput.d/default.
GNOME_KEYRING_CONTROL=/tmp/keyring-u15JAf
GNOME_KEYRING_CONTROL=/tmp/keyring-u15JAf
GNOME_KEYRING_CONTROL=/tmp/keyring-u15JAf
SSH_AUTH_SOCK=/tmp/keyring-u15JAf/ssh

(polkit-gnome-authentication-agent-1:1640): GLib-GObject-WARNING **: cannot register existing type `_PolkitError'

(polkit-gnome-authentication-agent-1:1640): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
Starting Dropbox...
(gnome-power-manager:1637): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.24.0/gobject/gsignal.c:2273: signal `proxy-status' is invalid for instance `0x9e97a70'
Initializing nautilus-gdu extension
Initializing nautilus-dropbox 0.6.2
** (nm-applet:1634): DEBUG: old state indicates that this was not a disconnect 0
Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.

Done!
There is no available graphics driver for your system which supports the composite extension, or the current one already supports it.

(gnome-appearance-properties:1765): Gdk-CRITICAL **: gdk_display_sync: assertion `GDK_IS_DISPLAY (display)' failed
WARNING: Application calling GLX 1.3 function "glXCreatePixmap" when GLX 1.3 is not supported!  This is an application bug!
Starting gtk-window-decorator
WARNING: Application calling GLX 1.3 function "glXDestroyPixmap" when GLX 1.3 is not supported!  This is an application bug!
FoxyProxy settingsDir: /home/leorolla/.mozilla/firefox/cex5ehw9.default/foxyproxy.xml

(gnome-terminal:1918): Gtk-CRITICAL **: gtk_accel_map_unlock_path: assertion `entry != NULL && entry->lock_count > 0' failed