Is there a software way to "fully" power my laptop off?

DUT: HP Laptop 14z-fq000 20.04

If I power off my laptop from GNOME, the screen goes totally black and the case gets totally cool. The rub is the battery loses 10% charge per day. My guess is something isn't turned off and the loss isn't due to battery self discharge.

If I power off my laptop from GNOME, wait for the screen to go black, and then press and hold the power button for 6 seconds, my laptop turns totally off, or at least the battery doesn't lose any (noticeable) charge over 24 hours.

Is there a software way to "fully" power my laptop off, using the terminal for example? If yes, what is it?

There is a lot of Q&A on this and similar topics but I couldn't find an answer to my question.

Many kind thanks in advance for at least reading this far!

Gary

Solution 1:

Ubuntu will tell the hardware to poweroff using the standard, published methods -- that's all it can do.

The Ubuntu developers won't know about an unpublished double-secret poweroff setting, and OEMs are generally unlikely to build in secret features that make their customers surprised and unhappy.

Reach out your OEM hardware support. Some kind of battery-draining hardware fault seems a much more likely culprit.