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- HP Zbook G10 sleep and modern standby issues

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10-13-2023 08:53 AM
Hi
I noticed that my laptop (Zbook Fury G10) doesn't fully sleep or hibernate. Even after placing the laptop in one of these modes, the fans are on, the device wakes up unexpectedly, and draws battery. This might be occurring due to "Modern Standby" as some online forums suggested. Is there any way to disable this shallow sleep, and use full sleep as I could get on earlier devices? I could not find any option in the BIOS or Windows 11.
The shallow sleep is not useful, since it wastes energy by necessarily waking up, and could be harmful, such as when the device wakes up when inside a bag and starts overheating and draining battery.
[Shutting the device down is not feasible always, since shutting down the device also deletes cached licenses of some subscription software I use, and the places I move to might not have an internet connection I can use. I did not have this issue with a prior HP laptop I owned.]
Thank you!
10-25-2023 05:03 AM
Hello Raghav101.
Unfortunately Intel (the CPU manufacturer) has removed the ability to go to S3 sleep on all its processors, starting with 11th gen Tiger Lake CPUs. This is because it believes Modern Standby is......well the modern way for a system to Sleep. Even on 11/12/13th gen laptops that don't have S3 removed from the BIOS, if you disable Modern Standby and try S3 sleep, it will seem to work fine, but will never resume from standby. This is why HP has (reportedly) started removing S3 on a BIOS level as well. Therefore, I'm afraid it's not possible to go to good old-fashioned Sleep on your system. What all of us do nowadays (this includes myself as well) is use hibernation.
I've only seen one thread on the HP forum where someone implied that hibernation (S4) is completely disabled on the system (https://h30434.www3.hp.com/t5/Business-Notebooks/Modern-sleep-problems-in-Linux/td-p/8884504). I haven't been able to confirm if the recent Elitebooks and ZBooks (G9/G10) have removed this from their BIOS along with S3. It seems more probable that the cause of the problem with hibernation is Modern Standby. This is because Modern Standby doesn't allow S4 to work correctly. Microsoft explains it here: "Although Modern Standby systems support Hibernate (S4) state, it is not entered automatically after a fixed amount of time in sleep. Instead, Windows manages Hibernate intelligently, only using it when required to preserve user's battery life. That's because modern standby is a consistently low-power state with long battery life." Therefore, what you need to do is completely disable Modern Standby, and simply keep Hibernate. Bear in mind that after you disable it, you must change all your Windows settings to "never sleep".
Disabling Modern Standby does not involve an option in either BIOS or Windows settings. It is hidden, and you have to change a value in your Windows registry. Many guides exist online, here's one: How to Disable Modern Standby (Win10/11) . Use the powercfg /a command mentioned on the page to verify that S4 (hibernate) is still an option on your system.
If you can't or don't want to DISABLE Modern Standby, Microsoft has provided a complicated way to tweak the S4 timers. I haven't tried it myself, but the information is on this page: Adaptive hibernate overview .