voici les logs de l'heure du crash, j'ai rien trouvé d'autre...
Oct 28 00:40:37 sme-hp init: tty (/dev/tty1) main process (3232) killed by TERM signal
Oct 28 00:40:37 sme-hp init: tty (/dev/tty2) main process (3234) killed by TERM signal
Oct 28 00:40:37 sme-hp init: tty (/dev/tty3) main process (3236) killed by TERM signal
Oct 28 00:40:37 sme-hp init: tty (/dev/tty4) main process (3240) killed by TERM signal
Oct 28 00:40:37 sme-hp init: tty (/dev/tty5) main process (3242) killed by TERM signal
Oct 28 00:40:37 sme-hp init: tty (/dev/tty6) main process (3244) killed by TERM signal
Oct 28 00:40:39 sme-hp acpid: exiting
Oct 28 00:40:39 sme-hp init: Disconnected from system bus
Oct 28 00:40:39 sme-hp console-kit-daemon[13829]: WARNING: no sender
Oct 28 00:40:39 sme-hp kernel: Kernel logging (proc) stopped.
Oct 28 00:40:39 sme-hp rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1157" x-info="
http://www.rsyslog.com"] exiting on signal 15.
Oct 30 08:39:57 sme-hp kernel: imklog 5.8.10, log source = /proc/kmsg started.
Oct 30 08:39:58 sme-hp rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1007" x-info="
http://www.rsyslog.com"] start