if your notebook powers down and doesn`t show that something is still "on" and consuming power - i`d call that "broken by design".
it should not be up to the operating system to make sure that all parts of the hardware are switched to off.

if i power down some device and there is nothing showing "hey, here is something active" (e.g. by some led or lcd) - i expect it to stop consuming power. 

maybe it`s not that broken as my PC, which is consuming 20W after power-off  (due to power-supply) - but i really would go ask the vendor and first complain there.

they should know the details.
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Yes, you are right!

I don't know why, but as commented in Bug #10797, if I close my LCD
Display (activing LID), power on again (because when LID is actived, my
laptop hibernate), and shutdown, my battery charge not is changed.

Best regards,
Renato S. Yamane
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You must be triggering some combination of ACPI events that happen to do
the right thing on the system.  However if issueing a power off doesn't
turn off the system, then it really sounds broken.

-- 
Len Sorensen
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