Plötzlicher Absturz der GUI

Jul 21 12:00:57 linux-efji polkitd(authority=local): Registered Authentication Agent for unix-session:/org/freedesktop/ConsoleKit/Session7 (system bus name :1.178 [/usr/lib/polkit-gnome/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale de_DE.UTF-8)
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: Gtk-WARNING: gtkwidget.c:6794: widget not within a GtkWindow
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: Gtk-WARNING: gtk_widget_size_allocate(): attempt to allocate widget with width -47 and height -47
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: Gtk-CRITICAL: gtk_widget_get_mapped: assertion `GTK_IS_WIDGET (widget)' failed
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: GLib-GObject-WARNING: invalid (NULL) pointer instance
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: GLib-GObject-CRITICAL: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: Gtk-CRITICAL: gtk_widget_get_mapped: assertion `GTK_IS_WIDGET (widget)' failed
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: GLib-GObject-WARNING: invalid (NULL) pointer instance
Jul 21 12:00:58 linux-efji gdm-simple-greeter[21240]: GLib-GObject-CRITICAL: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
Jul 21 12:00:59 linux-efji gdm-session-worker[21249]: PAM pam_putenv: NULL pam handle passed
Jul 21 12:00:59 linux-efji gdm-session-worker[21249]: PAM pam_putenv: NULL pam handle passed
Jul 21 12:01:02 linux-efji polkitd(authority=local): Unregistered Authentication Agent for unix-session:/org/freedesktop/ConsoleKit/Session7 (system bus name :1.178, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale de_DE.UTF-8) (disconnected from bus)
Jul 21 12:01:05 linux-efji kernel: [12604.224180] wlan0: authenticate with 00:1c:4a:06:d3:da (try 1)
Jul 21 12:01:05 linux-efji kernel: [12604.226010] wlan0: authenticated
Jul 21 12:01:05 linux-efji kernel: [12604.226376] wlan0: associate with 00:1c:4a:06:d3:da (try 1)
Jul 21 12:01:05 linux-efji kernel: [12604.232784] wlan0: RX ReassocResp from 00:1c:4a:06:d3:da (capab=0x411 status=0 aid=2)
Jul 21 12:01:05 linux-efji kernel: [12604.232789] wlan0: associated
Jul 21 12:01:05 linux-efji dhclient: Internet Systems Consortium DHCP Client 4.2.1
Jul 21 12:01:05 linux-efji dhclient: Copyright 2004-2011 Internet Systems Consortium.
Jul 21 12:01:05 linux-efji dhclient: All rights reserved.
Jul 21 12:01:05 linux-efji dhclient: For info, please visit https://www.isc.org/software/dhcp/
Jul 21 12:01:05 linux-efji dhclient: 
Jul 21 12:01:05 linux-efji dhclient: Listening on LPF/wlan0/00:1a:73:9f:ab:2f
Jul 21 12:01:05 linux-efji dhclient: Sending on   LPF/wlan0/00:1a:73:9f:ab:2f
Jul 21 12:01:05 linux-efji dhclient: Sending on   Socket/fallback
Jul 21 12:01:06 linux-efji pulseaudio[21418]: pid.c: Stale PID file, overwriting.
Jul 21 12:01:08 linux-efji vmusr[21445]: [ warning] [vmtoolsd] The vmusr service needs to run inside a virtual machine.
Jul 21 12:01:08 linux-efji dhclient: DHCPREQUEST on wlan0 to 255.255.255.255 port 67
Jul 21 12:01:08 linux-efji pulseaudio[21451]: pid.c: Daemon already running.
Jul 21 12:01:08 linux-efji dhclient: DHCPACK from 192.168.178.1
Jul 21 12:01:08 linux-efji kernel: [12607.706555] martian source 255.255.255.255 from 192.168.178.1, on dev wlan0
Jul 21 12:01:08 linux-efji kernel: [12607.706561] ll header: ff:ff:ff:ff:ff:ff:00:1c:4a:23:38:ac:08:00
Jul 21 12:01:08 linux-efji dhclient: bound to 192.168.178.29 -- renewal in 381786 seconds.
Jul 21 12:01:08 linux-efji avahi-daemon[1313]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.178.29.
Jul 21 12:01:08 linux-efji avahi-daemon[1313]: New relevant interface wlan0.IPv4 for mDNS.
Jul 21 12:01:08 linux-efji avahi-daemon[1313]: Registering new address record for 192.168.178.29 on wlan0.IPv4.
Jul 21 12:01:10 linux-efji if-up.d/21-dhcpcd-hook-samba: No dhcpcd info nor dhclient leases file found for wlan0.
Jul 21 12:01:11 linux-efji SuSEfirewall2: Setting up rules from /etc/sysconfig/SuSEfirewall2 ...
Jul 21 12:01:12 linux-efji SuSEfirewall2: Firewall rules successfully set
Jul 21 12:01:14 linux-efji polkitd(authority=local): Registered Authentication Agent for unix-session:/org/freedesktop/ConsoleKit/Session8 (system bus name :1.209 [/usr/bin/gnome-shell], object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale de_DE.utf8)
Jul 21 12:01:23 linux-efji gnomesu-pam-backend: The gnome keyring socket is not owned with the same credentials as the user login: /tmp/keyring-hgyAjG/control
Jul 21 12:01:23 linux-efji gnomesu-pam-backend: gkr-pam: couldn't unlock the login keyring.
Jul 21 12:01:41 linux-efji smartd[1823]: Device: /dev/sda [SAT], 1 Currently unreadable (pending) sectors
Jul 21 12:01:41 linux-efji smartd[1823]: Device: /dev/sda [SAT], 1 Offline uncorrectable sectors
Jul 21 12:01:41 linux-efji smartd[1823]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 60 to 62
Jul 21 12:01:41 linux-efji smartd[1823]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 40 to 38
Jul 21 12:01:41 linux-efji smartd[1823]: Device: /dev/sda [SAT], SMART Usage Attribute: 195 Hardware_ECC_Recovered changed from 77 to 75
Jul 21 12:02:17 linux-efji gnomesu-pam-backend: The gnome keyring socket is not owned with the same credentials as the user login: /tmp/keyring-hgyAjG/control
Jul 21 12:02:17 linux-efji gnomesu-pam-backend: gkr-pam: couldn't unlock the login keyring.
Jul 21 12:04:55 linux-efji gnomesu-pam-backend: The gnome keyring socket is not owned with the same credentials as the user login: /tmp/keyring-hgyAjG/control
Jul 21 12:04:55 linux-efji gnomesu-pam-backend: gkr-pam: couldn't unlock the login keyring.
Jul 21 12:05:43 linux-efji kernel: [12882.154737] loop: module loaded