kern/114970: Wrong system time (last) when machine is crashed due to lose power

[Jin Guojun]

>Number:         114970
>Category:       kern
>Synopsis:       Wrong system time (last) when machine is crashed due to lose power
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jul 27 17:50:01 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Jin Guojun
>Release:        6.2-RELEASE
>Organization:
LBL
>Environment:
FreeBSD bsd-ms 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Tue May 29 15:34:22 PDT 2007     root at bsd-ms:/usr/src/sys/i386/compile/SMP.MM  i386

>Description:
gjin             ttyv0                     Fri Jul 27 10:24   still logged in
reboot           ~                         Fri Jul 27 10:23
gjin             ttyv0                     Thu Jul 26 15:34 - crash  (18:49)
reboot           ~                         Thu Jul 26 15:33
shutdown         ~                         Thu Jul 26 15:32
root             ttyv0                     Thu Jul 26 15:14 - shutdown  (00:17)
reboot           ~                         Thu Jul 26 15:14
shutdown         ~                         Thu Jul 26 15:12
root             ttyv0                     Thu Jul 26 15:08 - shutdown  (00:03)
reboot           ~                         Thu Jul 26 15:08
shutdown         ~                         Thu Jul 26 15:06

When power outage or other thing happened to cause machine down, the last did not provide a correct down time when this happened. The crash line shows the time duration when the machine is rebooted, not the machine was crashed.
>How-To-Repeat:
Logon as a user and unplug the power. Wait for a hour or longer then power on the machine, then type last command to check the timestamp.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: