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Laptop uptime - since suspend (feddit.uk)

submitted 1 week ago by Cyber@feddit.uk to c/linux@lemmy.world

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Just been supporting someone remotely and was waiting for them to turn on their laptop...

Whilst troubleshooting I ran uptime to see how long we'd been working on the problem and saw it was up for ~2 weeks...

Which made me think ... how do you tell how long a device (laptop) has been running, but since it's last suspend / hibernation?

I can find it from other clues such as journalctl -b -fu systemd-logind and look for Lid opened, but I was really looking for an smarter way...

Just a nice little challenge for anyone bored at this time of year :)

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[–] HelloRoot@lemy.lol 8 points 1 week ago* (last edited 1 week ago) (1 children)

journalctl --list-boots

If you see multiple entries without reboots, those intermediate boundaries are suspend/resume cycles.

you can get the last resupe time with either

journalctl -b -1 -g "PM: suspend exit"

or maybe

journalctl -g "resume from suspend"

I don't have my laptop with me rn, so it would be nice if somebody can confirm whether this works

[–] Cyber@feddit.uk 2 points 1 week ago

Thanks, yeah, it looks like the journal is the main way.

I was also trying last and who, but they didn't help

And I was hoping there would be an easy systemd approach