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From: Lei YU <mine260309@gmail.com>
Date: Mon, 10 Dec 2018 13:11:11 +0800
Message-ID: <CAARXrtmsQja0x+oobViG6Pnj08fpNBNaW2+tapXt3z+e235A_Q@mail.gmail.com>
Subject: Re: Help: Host powered ON and after seconds Host Power OFF script is
 started.
To: maheswari.a@atos.net
Cc: OpenBMC Maillist <openbmc@lists.ozlabs.org>
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> What are all the process is responsible to send Host state signal as quiesce to phosphor-host-state-manager. ?.
> If phosphor-watchdog or system_manager is responsible.Please let us know clear view of understanding.
> In our platform, We are not using BOOTCOUNT sensor concept as initial phase.
>

You are hitting the issue because of watchdog timeout.

Behind that there are several pieces:
1. phosphor-watchdog@poweron.service is started when host is powered on;
2. During host boots, hostboot sends ipmi watchdog reset commands to BMC;
3. If the watchdog times out, the service will start
obmc-host-timeout@0.target, and the "Wanted" services will be started,
including obmc-host-quiesce target.