Deleting a Few LOC Can Yield “Significant” Power Savings on Some Linux Systems

Re:Deleting a Few LOC Can Yield “Significant” Power Savings ... by rcxdude on Friday May 22, 2020 @08:50AM (#23271471)

> But even hibernation doesn't always work. My custom-built desktop PC frequently wakes itself out of hibernation in the middle of the night. I don't even know how that's possible, because I thought hibernation was "off, with RAM saved to storage". Which is just wonderful when I'm sleeping in the same room.

This is generally using ACPI 'wake timers', which allow the RTC on the motherboard to wake up the system at a particular time (which I think is a useful feature, but only if explicitly requested by a user). Windows is particularly bad at this, since scheduled events are allowed to use this by default to wake up the PC when they are supposed to fire (and 'UpdateOrchastrator' has one which fires in the middle of the night). There's a decent bit of info on how to identify why this is happening and stop it here:

https://superuser.com/questions/1020768/laptop-wakes-up-from...

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Re:Deleting a Few LOC Can Yield “Significant” Power Savings ... by rurban on Saturday May 23, 2020 @12:33AM (#23279915)

For me it's only my cat walking over the keyboard or mouse.

The third allowed option (Linux) is wake on lan, which is only triggered through my laptop. I automate WOL events sometimes over cronjobs, when the big machine needs to do some work overnight for some minutes, but very rarely, because it's too loud. But I do those wake up, sleep cycles occasionally automatically when the machine processes big events like the Berlinale, Cannes or Sundance Film Festivals.

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Re:Deleting a Few LOC Can Yield “Significant” Power Savings ... by Fire-Dragon-DoL on Saturday May 23, 2020 @09:15AM (#23282668)

Oh god thanks. This issue plagued me for the last 5 years, to the point I joked my desktop was possessed.

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