Problem when shutting down

[akonstam at trinity.edu]

On Sun, Oct 16, 2005 at 08:54:22PM -0500, Jeff Vian wrote:
> On Sun, 2005-10-16 at 09:35 -0700, Ian MacGregor wrote:
> > When I shutdown my computer, the system hangs while trying to set the 
> > hardware clock. This requires me to manually reset the power switch and, 
> > upon reboot, the time and date are wrong. I have set the correct date 
> > and time n the computer BOIS, so FC4 does not need to do this. How do I 
> > stop FC4 from setting the hardware clock to the OS time when shutting 
> > down or rebooting? I am thinking that this would solve the hanging 
> > problem upon shutdown/reboot.
> > 
> > Ian M.
> > 
> This may be a problem, but the HW clock needs set with shutdown because
> it almost never is exactly accurate when the system has been running for
> a while.  In general, the time for the OS is set from the HW clock at
> boot time, and the time for the HW is set from the OS at shutdown.  An
> actual hang here can imply a problem, but definitely says that the OS
> and BIOS are not playing nice.  Do you perchance have the BIOS set to
> not allow it to be changed as some virus protection schemes do?  If the
> OS cannot write to the bios it presumable could cause a hang.
> 
> The other real question otherwise is "Does it actually hang - forever -
> during shutdown?  or does it just take a long time and you get impatient
> and power off without having it complete?"  If the latter, try waiting
> for a while to see if it will finish.  If the former then it may
> actually be a problem and may warrant looking at the bios virus
> protection scheme as a start point.
> 
> You say the date and time are wrong when you start up.  That implies the
> date and time are incorrect in BIOS or that you have the timezone set
> wrong, so the date & time are actually correct but for a different time
> zone.  It may also be that you told the system the bios is set to UCT
> when it is in fact set to local time, which would change the time in the
> OS at startup.
> 
However here is the mystery to me. The system clock is set from the
hardware clock at boot by running hwclock in /etc/rc.d/rc.sysinit. But
I can't find where the hwclock is run at shutdown. That is the place
to look for the problem.

-- 

-------------------------------------------
Aaron Konstam
Computer Science
Trinity University
telephone: (210)-999-7484