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arrêt d'un PC pour une raison inconnue



Bonjour,
Hier vers 13h50 mon serveur (ubuntu, apache, etc.) a eu un problème.
Je l'ai redémarré en fin d'après midi.

Si je regarde /var/log/syslog.0 j'ai :

[...]
Mar 24 13:49:14 localhost kernel: [6446932.951998] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:49:20 localhost kernel: [6446938.948539] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:49:26 localhost kernel: [6446944.945093] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:49:32 localhost kernel: [6446950.941638] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:49:38 localhost kernel: [6446956.938229] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:49:44 localhost kernel: [6446962.934772] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:49:50 localhost kernel: [6446968.931317] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:49:56 localhost kernel: [6446974.927866] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:50:01 localhost /USR/SBIN/CRON[19170]: (www-data) CMD ([ -x /usr/lib/cgi-bin/awstats.pl -a -f /etc/awstats/awstats.conf -a -r /var/log/apache2/access.log ] && /usr/lib/cgi-bin/awstats.pl -config=awstats -update >/dev/null)
Mar 24 13:50:02 localhost kernel: [6446980.924426] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:50:08 localhost kernel: [6446986.920967] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 13:50:14 localhost kernel: [6446992.917505] ACPI: Unable to turn cooling device [cea72f18] 'on'
Mar 24 18:37:16 localhost syslogd 1.4.1#21ubuntu3: restart.
Mar 24 18:37:16 localhost kernel: Inspecting /boot/System.map-2.6.22-14-server
Mar 24 18:37:16 localhost kernel: Loaded 25607 symbols from /boot/System.map-2.6.22-14-server.
Mar 24 18:37:16 localhost kernel: Symbols match kernel version 2.6.22.
Mar 24 18:37:16 localhost kernel: No module symbols loaded - kernel modules not enabled. 
Mar 24 18:37:16 localhost kernel: [    0.000000] Linux version 2.6.22-14-server (buildd@terranova) (gcc version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)) #1 SMP Tue Feb 12 08:27:05 UTC 2008 (Ubuntu 2.6.22-14.52-server)
Mar 24 18:37:16 localhost kernel: [    0.000000] BIOS-provided physical RAM map:
Mar 24 18:37:16 localhost kernel: [    0.000000]  BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
[...]

Je suppose que le "Unable to turn cooling devince on" n'est pas un
problème (même si je m'en passerai) puisque le PC tourne sans chauffer
depuis plusieurs semaines.

Peut-on avoir la cause de l'arrêt de mon serveur à 13h50 ?

Merci

Pierre


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