Automatic suspend/wake up

[caru]

Is it possible in A20 Debian? Any idea how to achieve it?

caru

[dlombardo]

Any update on this?

What is optimal Suspend / Wake up setup for - low power standby - on mains power supply with the Debian image?
Is it possible to Wake up via ssh or background Daemon trigger ?
Besides the manual Power button.


Also, from other posts I read it is problematic even using Power button.

1. A20 suspend problem - https://www.olimex.com/forum/index.php?topic=2144.0

I have problem width a20 suspend mode (battery powered).
Linux image: ULTIMATE A20 Debian release 5.

Board not wake'ups, when press power (or any other) button for 1,2,3
seconds.
If keep pressed power button longer, board goes completely to OFF.

It might not save power !?

Problem may by in sleep mode because power consumption in sleep mode
is the same as in working mode: ~ 0.2A.

Finally, there seems different operation if run from the LiPo batery or Power supply (mains?)

This (reboot instead of powerdown) really happens when powered from mains supply. When working from battery - halt does powerdown as expected.
As I understand this is by-design behaviour? Anyway this is also OK for me.

2. Suspend/Resume - https://www.olimex.com/forum/index.php?topic=1946.0

You need to hold the power button down for a few seconds to wake the board up.

You might adjust the time until sleep occurs in the OS settings.

Best regards,
Lub/OLIMEX

What if Power supply is actually a 12V akku? (car, boat etc)

The standby mode - low power - is a must for several applications.