Dell S3 sleep mode - again

I have XPS 7590 4K with i7-8250h, GTX 1650 Ti.  Follow this step https://www.notebookcheck.net/Useful-Life-Hack-How-to-Disable-Modern-Standby-Connected-Standby.453125.0.html

It works wonderfully, can sleep to S3 for days without draining the battery. The default sleep from Windows10 will drain the battery and kill the battery very fast.   I always make my laptop CUSTOM charge from 50-60% and the battery capacity remains above 90% after 2-3 years.  We also can use Dell power management to set this number on the fly, not from BIOS.  I also have Linux Ubuntu 20.04, it works fine with S3 sleep following another blog https://wiki.archlinux.org/title/Dell_XPS_15_9570 

I have not tried it on XPS 7590.  You can try 

Thanks, I tried that on my XPS 9370 and it still didn't behave properly. I'm not even sure its purely a Windows thing, the Dell BIOS seems to be at least partly to blame.

Anyway, my Dell is now getting on in years and I'll soon be in the market for a new laptop. As Dell don't seem to have fixed this issue or even care what their customers think, can anyone recommend a different brand which does normal S3 sleep? Probably all of them apart from Dell I suspect. 

My wife's HP which is newer seems to behave with respect to sleep, but I'm looking for 4K display. The Dell has touchscreen but I hardly ever use it so that's not essential. 

Any ideas?

I have a dual partition with ubuntu and windows on dell xps 9510. But sleep does not work on ubuntu. If i remove windows completely and re-install ubuntu, do you think the sleep button would work? It seems that I'd have to reset, per say, the BIOS.

What do you think?

Did you have the settings below already present? More specifically, the output s2idle on the first box? On my dell xps9510, i am dual booted with ubuntu and windows. When I enter the command on the first box, I just received the 's2idle' and not 'deep', which, from my understanding, means that I cannot set up deep sleep (s3).

P.S: screenshot is from the second link you shared.

I finally fixed this sleep problem definitively and permanently by....................

Buying an ASUS ZenBook Pro 15

Beautiful - 4K OLED touch screen, (better than Dell's), all round a great machine, better price to.

When I put it to sleep, it just.....sleeps. Quietly, no fans whirring away for ages, no heat, just like S3 sleep should be.

I would have bought Dell again but this sleep problem is something they should have addressed

I totally agree to everybody. There is no S3 option in my new G15 Dell laptop. Registry hacks and other solutions don't work, because BIOS says to OS that S3 is not supported by the hardware. When I disable modern standby, sleep option is completely removed from power options. The 8 core 16 thread 45 watt boosts over 4ghz on battery, with no option to sleep. BIOS should have S3 Sleep option as soon as possible. Otherwise Dell will be last laptop for me. 

Was in the market for buying a new XPS Plus. This lack of S3 made me decide otherwise and I went for a HP Spectre. I used to be happy with DELL laptops but since they are getting political about the entire standby topic I decided to vote for a different manufacturer.

I wasted a couple of hours with support trying to "fix" this issue by playing around with settings. My $3k XPS 9720 overheats even on my desk just because of the "modern sleep S0".

Nothing worked even registry changes. It is either both S0 and S3 get disabled or only S3 is disabled. Looking for alternatives as it is a must for me to be able to put my laptop in a bag without the need to shutdown/hibernate. Wish I saw this thread before buying it.

Agree with you. I have explained to Dell on numerous occasions and demonstrated how Modern Standby is fundamentally flawed. But I would bet anything that Dell engineers and representatives don’t use Dell laptops in their life. Otherwise, they wouldn’t suggest complete nonsense like “oh, don’t like it, try hibernate mode instead” or “laptops should be turned off while commuting”.

I didn't expect a Laptop (XPS-9310 from 2020) built after 2010 to be missing a vital ACPI power mode that gives us the best hardware power savings (S3), and then LIE about it in the UEFI pages (a tick box which says to block S3 mode... when it's not available no matter what the tick box is set to).

This is about putting your laptop into a low power mode to either move about or put out of the way for an unknown amount of time.. It's not a phone or a tablet, it is a LAPTOP.

Not only this, but my 9310 came with "RAID" disk drivers enabled by default - which have actually affected the power consumption on my laptop both in and out of S2 (using fan, generating heat, preventing C10 states in the CPU). Switching to AHCI solved it and reduced the heat+power (so if you guys find your devices get hot, maybe try switching that).

I can categorically say that I will never buy a Dell laptop again because of their poor power policies/implementation, and am instead going to purchase a more apropriate competitor, and will recommend everyone around me to do the same.

My last Dell laptop. What a shame! What are they thinking??? I can't make S3 work no matter what. Every few days my computer will become hot like a pan and I am just waiting for the day my house will burn.

Is this BIOS issue? Because if it is then replacing Windows with Linux won't help. I would switch immediately if I can have good old sleep option back. What do you think?