I’m having an issue getting the X15 to power on after power outage. I have the bios set to Power On after AC Power loss, however, the MegaRAC SP-X does not boot the system after power loss and there doesn’t seem to be a setting to Power On after AC Power loss.
My current Unraid is set to tell my system to power down when my UPS has a power outage. When the power comes back on I need to access BMC and tell the system to power on.
I don’t think a cntrolled “UPS on stanfby power” shutdown event is the same as AC total power loss to the X15. As long as there is still power in the UPS battery to trickle feed the BMC, then the AC power is still on as far as the BIOS is concerned.
A solution might depend on exactly what UPS make/model you have and what else is connected to it. One option is that I believe Unraid has a “Settings → UPS Settings → Turn off UPS after shutdown” setting. You can try setting that to Yes. After Unraid cleanly shuts down, it will tell the UPS to compleely shut off the load. Then when mains power returns it should appear as a an AC Power On event to the motherboard. Your spcific UPS might not support that command. And, it will shut off the load to all the UPS outlets, so if you have other things that need to stay on the UPS longer, like a 5G wireless home internet device, that would turn off along with the X15.
There might be a way to script something if you can’t shut off the trickle load, but that would depend on your UPS.