[kwlug-disc] UPS Power Down Question

[L.D. Paniak]

APM set to "power on" is probably OK so long as you make sure your UPS 
has had sufficient time to recharge (above your shutdown level).

If your UPS supports it, you might want to look at:
ups.delay.start


On 2024-11-11 13:54, Khalid Baheyeldin wrote:
> Here is a question:
>
> I have a server on a UPS, with NUT configured.
> If the power goes down and returns within a few
> minutes, the UPS takes over, and nothing happens.
>
> But if the power outage is extended, and beyond
> a threshold that I set in NUT (say 35% battery
> remaining, using the directives below), then the
> server will shutdown.
>
> [ups1]
>    driver = usbhid-ups
>    ...
>    ignorelb
>    override.battery.charge.low=35
>
> So far so good.
>
> But what happens when the power returns? The
> server's UEFI (under APM) is currently set to 'last
> state', which means the server will not power on.
> This is inconvenient if I am not at home when the
> power outage happens.
>
> Some systems use complicated workflows, including
> specialized management cards, or Wake Up on Lan,
> but I don't have any of that.
>
> Would setting UEFI's APM to 'Power On' solve this rare
> problem? Or are there drawbacks to this?
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