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If the host operating system is virtualized, then this problem occurs because the SMbus is not emulated on the VM. &nbsp;(There's little reason a emulate the SMbus on a VM because the VM &quot;hardware&quot; doesn't exist.)<br />
<br />
There are several discussions of this issue around &nbsp;which occurs commonly on RedHat and Centos virtualized systems. &nbsp;The solution is to blacklist the SMbus controller (see below).<br />
<br />
<a href="https://whitehatty.com/2012/09/30/vmware-fusion-5-fix-ubuntu-linux-12-04-host-smbus-controller-not-enabled/" rel="ugc">https://whitehatty.com/201<wbr />2/09/30/vm<wbr />ware-fusio<wbr />n-5-fix-ub<wbr />untu-linux<wbr />-12-04-hos<wbr />t-smbus-co<wbr />ntroller-n<wbr />ot-enabled<wbr />/</a><br />
<br />
<a href="http://askubuntu.com/questions/691729/piix4-smbus-0000007-3-host-smbus-controller-bus-not-enabled" rel="ugc">http://askubuntu.com/quest<wbr />ions/69172<wbr />9/piix4-sm<wbr />bus-000000<wbr />7-3-host-s<wbr />mbus-contr<wbr />oller-bus-<wbr />not-enable<wbr />d</a><br />
<br />
<a href="https://ubuntuforums.org/showthread.php?t=1099261" rel="ugc">https://ubuntuforums.org/s<wbr />howthread.<wbr />php?t=1099<wbr />261</a>
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If the host operating system is virtualized, then this problem occurs because the SMbus is not emulated on the VM.  (There's little reason a emulate the SMbus on a VM because the VM "hardware" doesn't exist.)

There are several discussions of this issue around  which occurs commonly on RedHat and Centos virtualized systems.  The solution is to blacklist the SMbus controller (see below).

https://whitehatty.com/2012/09/30/vmware-fusion-5-fix-ubuntu-linux-12-04-host-smbus-controller-not-enabled/ [https://whitehatty.com/2012/09/30/vmware-fusion-5-fix-ubuntu-linux-12-04-host-smbus-controller-not-enabled/]

http://askubuntu.com/questions/691729/piix4-smbus-0000007-3-host-smbus-controller-bus-not-enabled [http://askubuntu.com/questions/691729/piix4-smbus-0000007-3-host-smbus-controller-bus-not-enabled]

https://ubuntuforums.org/showthread.php?t=1099261 [https://ubuntuforums.org/showthread.php?t=1099261]

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Hello then reset the password user &quot;root&quot;, when you restart the server on Centos 7 , I have the following error:<br />
<b>&quot;Piix4_smbus 0000: 00: 07: 3: Host SMBus controller not enabled!&quot;</b><br />
as I can solve this problem to start the operating system.<br />
Thank you<br />
<a href="https://filedb.experts-exchange.com/incoming/2016/08_w36/1114152/piix4_smbus_Error1.JPG" target="_blank" class="file-inline" title="piix4_smbus_Error1.JPG (27 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>piix4_smbus_Error1.JPG</a>
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piix4_smbus_Error1.JPG

Hello then reset the password user "root", when you restart the server on Centos 7 , I have the following error:
"Piix4_smbus 0000: 00: 07: 3: Host SMBus controller not enabled!"
as I can solve this problem to start the operating system.
Thank you

Piix4_smbus 0000: 00: 07: 3: Host SMBus controller not enabled!

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