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Easiest way to capture power states of machine? (Boot/Poweroff/Sleep/Wake) (lemmy.ml)

submitted 1 day ago* (last edited 20 hours ago) by [email protected] to c/[email protected]

4 comments fedilink hide all child comments

I'm looking for a reliable way to log when my laptop is:

powered down
boots up
goes to sleep
wakes up

Currently I'm checking both the systemd-suspend and tlp systemctl services, but these don't really feel very robust, and I don't have TLP installed on all my machines.

Is there an easier way to do this, or a better systemctl unit that logs all the power states of my machine. Preferably laptop agnostic?

Laptop snippet so far:

journalctl --since -9days -u systemd-suspend -u tlp \
    | grep -P "Finish|Start|Stopped" | sed '/.*Finished TLP.*/d;
            s|Starting TLP.*|╭╴System Boot  |;
 s|Starting System Suspend.*|┤ · Sleep      |;
 s|Finished System Suspend.*|├ · Wake       |;
             s|Stopped TLP.*|╰╴Power Off    |;' \
    | sed -r 's|^(.*:[0-9]+)+:[0-9]+.*:(.*)|   \1 \2 |'

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[–] [email protected] 1 points 2 hours ago* (last edited 2 hours ago)

For boot and power down, create a service to log it.

For the others, an elogind script might be what you look for.

[–] [email protected] 2 points 23 hours ago (1 children)

Are you asking about uptime monitoring on a remote host, or the actual last state of the machine once X happens via logged info on the machine?

If the former, you can add a hook that pings somewhere before X action takes place.

For the latter, it should be in dmesg, both going not and coming out of different states.

[–] [email protected] 1 points 23 hours ago (1 children)

I guess uptime monitoring of any host, with specific timestamps for when the system is suspended/resumed.
(Yes I understand that a server ideally shouldn't sleep)

[–] [email protected] 3 points 22 hours ago

in your shoes i would use a loop to iterate through journalctl's up/down sessions getting the first and last lines of each and then use awk to printout the timestamps and sed to add in power state changes.