Guys, This is one for you to puzzle over. I've never seen it before. I had an apcupsd commanded shutdown at Aug 1 13:20:15 (not uncommon - power is terrible). However, when I restarted the hwclock had magically jumped ahead by 1 full month to Sept. 1. (the box was down for 56 minutes until I returned from lunch) Then on restart, I was dropped into the maintenance shell and required to run fsck manually due to the future date. There was a message that stated something line "run fsck manually on /dev/sdc5 ... the system will reboot automatically after fsck completes" (this looked like an abbreviated maintenance shell -- I guess due to the fact that the root fs was the one that was being checked /dev/sdc5. fsck completed (e2fsck), but the box didn't reboot. So I typed 'reboot' -- nothing happened. Checked /usr/bin and reboot was present. So then I finally did ctrl+alt+del and the box restarted. I was then dumped into the normal maintenance shell to fsck /home on /dev/sdc7. It completed and reboot worked normally. My questions are (1) does anybody have any idea how this can happen? (2) Anybody else every seen this? and (3) could the kernel apcupsd segfault (shown below) be the cause? Any ideas welcome. Strange stuff... The relevant everything.log snippet and bios info is below: Aug 1 13:20:15 providence apcupsd[3477]: apcupsd shutdown succeeded Aug 1 13:20:15 providence kernel: [171092.364247] apcupsd[3477]: segfault at 0 ip 0805c706 sp bfcdfff0 error 4 in apcupsd[8048000+38000] Aug 1 13:20:15 providence ntpd[3454]: Listen normally on 6 eth0 192.168.7.124 UDP 123 Aug 1 13:20:15 providence ntpd[3454]: peers refreshed Aug 1 13:20:15 providence ntpd[3454]: new interface(s) found: waking up resolver Aug 1 13:20:15 providence postfix/postfix-script[13735]: stopping the Postfix mail system Aug 1 13:20:15 providence postfix/master[3868]: terminating on signal 15 Aug 1 13:20:15 providence postfix/postfix-script[13738]: waiting for the Postfix mail system to terminate Aug 1 13:20:16 providence dhcpcd[424]: eth0: sending IPv6 Router Solicitation Aug 1 13:20:19 providence ntpd[3454]: ntpd exiting on signal 15 Aug 1 13:20:19 providence dhcpcd[13884]: sending signal 1 to pid 424 Aug 1 13:20:19 providence dhcpcd[424]: received SIGHUP, releasing Aug 1 13:20:19 providence dhcpcd[424]: eth0: releasing lease of 192.168.7.124 Aug 1 13:20:19 providence dhcpcd[13884]: waiting for pid 424 to exit Aug 1 13:20:19 providence dhcpcd[424]: eth0: removing interface Aug 1 13:20:19 providence kernel: [171096.790000] pcieport 0000:00:1c.0: wake-up capability enabled by ACPI Aug 1 13:20:19 providence syslog-ng[352]: syslog-ng shutting down; version='3.3.5' Sep 1 14:16:20 providence kernel: [ 0.000000] Initializing cgroup subsys cpuset Sep 1 14:16:20 providence kernel: [ 0.000000] Initializing cgroup subsys cpu Sep 1 14:16:20 providence kernel: [ 0.000000] Linux version 3.4.7-1-ARCH (tobias@T-POWA-LX) (gcc version 4.7.1 20120721 (prerelease) (GCC) ) #1 SMP PREEMPT Sun Jul 29 20:05:01 UTC 2012 BIOS Information Vendor: Dell Inc. Version: A04 Release Date: 02/09/2005 -- David C. Rankin, J.D.,P.E.