George N. White III:
> Some UPS software blocks non-root logins after sending a "shutdown now" 
> message
> when UPS battery capacity is low.  If the battery has died, it may continue 
> to broadcast 
> shutdown messages after power is restored.  I think some UPS systems and 
> software
> can stay in "shutdown now" mode until the battery can provide the configured 
> run time,
> 

So, thinking out loud...  If you're back on mains power, trusting it to
stay available and trying to get your computers back to life while a
UPS is recharging, you might temporarily disconnect a data link between
UPS and computer?

If the laptop battery was in a good state, I'd disconnect totally from
the UPS.  A laptop should manage to run itself, quite fine, with the
mains power coming and going.  Mine always did.
 
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