How to wake up VIM4 from s2idle mode?

VIM4
1

Which system do you use? Android, Ubuntu, OOWOW or others?

Ubuntu

Which version of system do you use? Please provide the version of the system here:

Khadas new VIM4

Please describe your issue below:

I am currently testing low-power deep sleep modes on the new Khadas new VIM4. I’ve noticed there are two modes: deep and s2idle.

  1. In deep mode: The system wakes up perfectly when I press the PWR button.

  2. In s2idle mode: The system enters sleep, but it does not wake up when I press the PWR button.

Is there a specific way or a different trigger to wake it up from s2idle? Any advice would be appreciated. Thanks!

2

Hello @manjookim

Could you share your steps how you test?

3
  1. a) To test s2idle mode:
echo s2idle | sudo tee /sys/power/mem_sleep
  1. b) To test deep mode:
echo deep | sudo tee /sys/power/mem_sleep

&&

  1. Execute the following command to put the system into sleep mode:
sudo systemctl suspend
  1. Press the “PWR” (Power) button to wake the system and verify the resume process.
4

Hello @manjookim

Thanks, we will check on our side.

1 Like
5

I apologize for the issue; this is a confirmed bug. I will notify you immediately once a fix is in place.

1 Like
6

I have an additional question.

I’ve already tried WOL, but it only works in ‘deep’ and not in ‘s2idle’ sleep.

Is there another software-based method to wake the device from sleep?