Ubuntu: Laptop will not resume from suspend if the charger is removed



Question:

I have seen this problem (or a similar one) with an older laptop a number of years ago.

If I suspend my laptop while connected to power, and then remove the charger, it will not be able to resume. I need to crash the laptop and reboot. Suspend works fine if it stays plugged in, as well as if I suspend it when the laptop is unplugged. Suspend also works if I suspend while it is unplugged, and plug it in. The only time it does not is if I unplug once it has already suspended.

Below are my current power centers My power settings currently


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