Reduce battery depletion when in suspend mode on Ubuntu 21.10

USER_92

2/28/23, 4:54 AM

I recently installed Ubuntu 21.10 on my new machine, dual-booting with Windows (for the time being). My setup is however not the usual setup; I have a /boot partition of 1GB on my disk and a / partition of 128GB setup with LUKS (by selecting "physical device for encryption" in the installer and then selecting it as the root partition).

Now, everything but the suspend mode works fine. When I enable suspend, my power usage is exactly the same as if my machine was being used, which is odd. For example, in 30 minutes time there would be a battery drop of 2%.
I checked /sys/power/mem_sleep to check the kernel system sleep state, which was set to s2idle. So, following a post somewhere else, I changed it to the deep (by changing the kernel args in GRUB). Now this resulted in the entire battery finishing off in less than three hours! So, I switched it back to s2idle which atleast has a lower battery drop.

Point to note: The battery drop doesn't happen on Windows

I'd really appreciate any recommendations from the community! FWIW, I'm on a Dell Inspiron 16 (2021, with NVIDIA GFX; proprietary drivers installed and set to integrated graphics to save power)

Edit

uname -r: 5.13.0-20-generic
Display server: Wayland/Xorg (same result on both)

0 + 0

battery

grub2

power-management

uefi

secure-boot

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Reduce battery depletion when in suspend mode on Ubuntu 21.10

TH: ลดการสิ้นเปลืองแบตเตอรี่เมื่ออยู่ในโหมด Suspend บน Ubuntu 21.10

RO: Reduceți epuizarea bateriei în modul suspendare pe Ubuntu 21.10

RU: Уменьшите расход заряда батареи в режиме ожидания в Ubuntu 21.10.

VI: Giảm hao pin khi ở chế độ treo trên Ubuntu 21.10

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