My ZBook appears to be configured for "modern standby." How can I enable a "deep sleep" option?

[gkline]

On my old HP Pavilion laptop running Windows 10, it goes to sleep when I command it and there are no log entries between the time it sleeps and the time it wakes up. The casing is bone cold.

Yet, on my HP ZBook, I'm finding that when putting it to sleep while plugged in, it doesn't really sleep. The casing is slightly warm many hours after sleeping and upon waking up. Checking the Event Viewer, I see many log entries across the time sleeping started and ended. I really don't want my ZBook doing anything. I don't want it checking for updates, accessing the Internet--NOTHING.

I've discovered that Windows 11 features several flavors of sleep now. There's "quick" or "modern," and then there's "deep." I really don't need my ZBook to be super-fast at startup, especially if it's going to make a sacrifice of wear and tear on the battery, and possibly CPU, RAM, and SSD (continued activity).

So my question: Can I configure my ZBook for deep sleep? I've not been able to figure it out yet. Or... is "Hibernate" the only other option?

[gkline · Accepted solution]

OK... so, once again... I answered my own question.

Apparently HP decided for the system firmware configuration of the ZBook line, there is S0 (modern standby) enabled while S3 (deep sleep) is consequently disabled. It's either sleep or hibernate.

Over on ElevenForum there's a tutorial where a registry edit can disable S0 and enable S3 (deep sleep).

Sure enough... it did show that Standby (S3) was enabled

HOWEVER, this did not behave as expected. In fact, putting the notebook into sleep by closing the lid did NOT put it in sleep mode. In fact, it caused the ZBook to remain wide awake. There were no log entries for 8 hours, but the notebook being in a confined space ended heating up significantly. The fan noise was very audible. So this fix is a fail.