Does not wake up from sleep at Intel i5 11th Gen

[Junenosuke]

Hello.
I am currently using a PC with the following specs

• Fujitsu LIFEBOOK u9311/F
• 11th Gen Intel Core i5-1145G7 [Iris XE Graphics]
• Bruch 128 Stable
• I used 'dedede ' (beetley) recovery with kernel 5.15 in settings brunch .

Under these conditions, ChromeOS boots and runs without any problems, but unfortunately it cannot come back from sleep, it either reboots or freezes and the screen goes black. It reboots more often than not, I have tried multiple recoveries including rammus and volteer with the same result.
Please let me know if there are any Branch settings or other areas that need to be adjusted.

Thanks a lot.

[Junenosuke]

I have tried the following...

• Another recovery images (rammus, volteer)
• Disabled TPM on BIOS settings
• Kernel of all versions (6.6, 6.1...or others)
• kernel parameter iommu=off
• Tried older BIOS versions... BIOS downgrades were not allowed on this PC

However, nothing has improved the situation and the battery life is not as good as with the S3 option applied, although it is currently being addressed by turning off the screen light to avoid going to sleep.

Any ideas ?

[Junenosuke]

I am not ready to give up and am working on this problem, but today I found a hint for a certain setup.
I have several PCs for dual booting Windows/ChromeOS and I also found a distinct difference between PCs that can come back from sleep and those that can't.

I run the following command in PowerShell on Windows,

powercfg /availablesleepstates

The following sleep states are available on this system
you will see that you can get the status “The following sleep states are available on this system.
PC-a) We can see that “Standby (S3)” and “Hibernate” are available for PCs that can return from sleep.
PC-b) For PCs that cannot return from sleep, “Standby (S0 Low Power Idle)” and “Hibernate” are available.

In b), it is considered to mean that even if “suspend_s3” is set in Kernel Options, it is not possible to recover from sleep.
Now I will investigate how to solve this problem (or is it unsolvable).
Ubuntu OS seems to have an effective solution.

If anyone (or @sebanc ) has any tips, please feel free to let me know.