ESXi 6.7 not loading IPMI modules at startup

Hi,

Running ESXi 6.7.0 Evaluation copy on one of our Intel based SBCs. For some reason the IPMI modules are not being loaded at host start-up.

VMkernel.Boot.ipmiEnabled is set to true.

I can load them manually using :-

vmkload_mod ipmi_si_drv

vmkload_mod ipmi_devintf

I then get from esxcfg-module -l|grep ipmi

ipmi_msghandler     2     40

ipmi_si_drv               0     48

ipmi_devintf               0     20

Then using the Web Client under Monitor->System sensors I get the sensor info displayed, i.e. CPU temp/Volts, etc.

I have made sure they are all enabled using :-

esxcli system module set -m ipmi_si_drv -e 1

esxcli system module set -m ipmi_devintf -e 1

esxcli system module set -m ipmi_msghandler -e 1

Then using 'esxcli system module list|grep ipmi' I get:-

ipmi_msghandler     true     true

ipmi_si_drv               true     true

ipmi_devintf               true     true

I have obviously rebooted the host (many times!), but the modules are still not loaded at start-up.

Has anyone any ideas or seen this before for other modules?

Many thanks in advance,

Chris