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If your laptop is using a recent AMD Ryzen based SoC:

ACPI C4 power state (for powering down more of the SoC during S0ix suspend) is not supported on Linux yet, for recent (last couple years) AMD processors.

Patches submitted for 6.18 were described as "laying the foundation for AMD C4 support". So, maybe won't be fully supported until 6.19 or even later; Sorry, I haven't followed up to see what has actually landed.

Thank you - Good info

I have one of the older ones. I think there's a way to set up "real" hibernation on Linux but it seems like a pain in the ass

I shut mine down completely and haven't had the battery drain issue, but on "modern standby," yes these don't last very long. Probably 2-3% per hour on standby and worse than that if anything is plugged into the expansion slots.

If you're going to put it in a bag for a week, why not use some kind of hibernation feature?

You have to muck around with your disk partitions on Linux (although windows I think supports it out of the box)... I haven't spent enough time researching it to feel confident I can do it without borking my system