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Battery drain with poweroff



Hi.

On my new Acer TravelMate Spin B3, running recent Bullseye, I have
noticed a strange battery drain when the computer is powered off: it
loses about 1% of the total battery charge every hour, which makes a
quarter of the battery in a day.

The drain happens when the computer has been powered down with poweroff
or an equivalent. I have checked, and it does not happen if I power down
with a long press on the power button (after halt). Therefore, it is a
sign of something staying powered with the normal kernel shutdown. I
have checked that wake-on-lan, wake-on-RTC-clock and similar features
are disabled in the setup.

Does anybody have an idea about what could be the culprit or how to
investigate?

Thanks in advance.

-- 
  Nicolas George

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