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Is it possible to start a Linux computer via a RS232 serial port when it is actually turned off and not in a sleep/powersaving mode?
I am aware of this other Super User question (“Turning on computer using communication port”) but the answer isn't applicable here because it only offers an alternative that isn't feasible for me.
Fynn
Posted 2018-05-31T13:52:49.723
Reputation: 13
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That depends on if your motherboard supports ACPI Wake-on-Ring on RS-232. It would be totally dependent on your motherboard and the device you're connecting to being able to send a Ring Indicator signal
Linux itself supports Wake-On-Ring, just enable it
enable the UAR1 by running echo UAR1 > /proc/acpi/wakeup
Evan Carroll
Posted 2018-05-31T13:52:49.723
Reputation: 1
This is very interesting, the mainboard manufacturers website says it supports "ACPI 6.0 Compliant wake up events" so i guess i'll dig deeper into the manual tomorrow. Thanks a lot! – Fynn – 2018-06-01T00:09:01.570
You should probably put details on why the other answer is not applicable here... – Patrick Mevzek – 2018-05-31T14:47:13.380
Because it gives an alternative (which isn't feasible for me) and doesn't answer the question if its possible. – Fynn – 2018-05-31T15:08:01.370
Should i add that to the question body? – Fynn – 2018-05-31T15:08:22.460
the more precise your question is, showing what paths you already explored and rejected for such and such reasons the more chance you have that people will give you good answers with new data (not repeating stuff you already excluded for some reason) – Patrick Mevzek – 2018-05-31T16:41:30.417