Bug 103016 - System hangs if AC power is restored during shutdown
System hangs if AC power is restored during shutdown
Product: Red Hat Linux
Classification: Retired
Component: nut (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Ngo Than
Brian Brock
Depends On:
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Reported: 2003-08-25 11:08 EDT by Jablonovsky Alexander
Modified: 2007-04-18 12:57 EDT (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2003-09-15 07:45:44 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Jablonovsky Alexander 2003-08-25 11:08:52 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.0.1) Gecko/20020823

Description of problem:
Most of UPS'es ignore the "power off" command in the "on line" state.
As a result, if a line power is returned back after the system shutdown started,
the system hangs in state "OS stopped, power on". This is vary
bad effect for unattended servers.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Start up a system with UPS and nut package installed.
2. Unplug the UPS AC cord from the outlet.
3. Wait until the system will start shutdown.
4. Plug the AC cord to the outlet again.

Actual Results:  The power is on, the system is halted.

Expected Results:  The system continues to function.

Additional info:

One of ways to fix this is to place 'reboot -f' after the UPS power-off command
in the /etc/rc.d/init.d/halt.
Comment 1 Jablonovsky Alexander 2003-08-25 12:35:41 EDT
This problem is already decribed in /usr/share/doc/nut-1.2.0/docs/shutdown.txt,
but currently does not fixed in RedHat 9 installation
Comment 2 Ngo Than 2003-09-15 07:45:44 EDT
it should be fixed in initscript-7.34-1, which is available in rawhide.

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