Precision 5570 lacks of deep sleep and drains battery overnight

Hi

I have problem with my Precision 5570. It is a great product except it does not know how to deep sleep.

When I close the laptop the battery gets drained overnight.

I use Ubuntu 24.04. 

I did some investigation and found that the problem is that the BIOS disabled the "S3 state" which in effect does not allow the underlying linux kernel to use "deep" sleep, instead it supports only "s2idle".

Whatever "s2idle" means, it is definitely not idle, it keeps fans running if hot and it drains the battery overnight.

I found that it could be fixed just by BIOS tweak or update.

I would like to ask DELL if you could please point me to a BIOS update where this issue is fixed.

I believe that this issue is not related only to Linux, I had Windows 10 previously installed and it did the same, except the battery drain was more extreme (overnight to 0%) with fans spinning all the time. At this moment I am however interested only in Linux solution.