Adding dependent service as Entity-manager to Ipmb-fru-service

Kumar Thangavel thangavel.k at
Mon Jun 21 19:31:41 AEST 2021

Classification: Public
Changing classification as Public.

From: Kumar Thangavel
Sent: Monday, June 21, 2021 2:58 PM
To: openbmc at
Cc: Ed Tanous <ed at>; Patrick Williams <patrick at>; Velumani T-ERS,HCLTech <velumanit at>
Subject: Adding dependent service as Entity-manager to Ipmb-fru-service

Classification: Confidential
Hi All,

           Ipmb-fru-device deamon trying to read some dbus objects from entity-manager to get the ipmb bus details. Entity-manager daemon initially taking some time to load all the dbus objects. But Ipmb-fru-device deamon starts at system startup.

           Since, Entity-manager deamon initially taking some time to load all the dbus objects, ipmb-fru-device getting the below error.

          Error :
          "ipmb-fru-device[345]:   what():  sd_bus_call: org.freedesktop.DBus.Error.UnknownObject: Unknown object '/xyz/openbmc_project/inventory/system/board/Yosemite_V2_Baseboard/IpmbBus1'."

         When we restart EM deamon once, this error got resolved.

         I tried to add EM service as dependent service to Ipmb-fru-device service. Added EM service in "Wants", "After" fields in Ipmb-fru-service service.

         But, still EM deamon taking some time load all the dbus objects.

         So, Could you please let us know to how to add the EM as dependent service. Or Please let us know if any other approach.

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