[bzzzt]

Mac M series don't do hibernation, probably because sleep has so little impact on battery life (my MacBook lasts for about a month in sleep mode) and Apple doesn't like to burden users with questions like 'what sleep mode to use'.

[izacus]

That's just plainly not true.

Apple calls it "Safe Sleep" (https://support.apple.com/en-gb/guide/mac-help/mh10328/mac) and you get a progress bar when it wakes from it. Yes, even on magical Ms.

[bzzzt]

Interesting, never heard of that specific mode before. Does it save the entire RAM or just the OS state and open files?

[acchow]

Most people don't encounter this. It only happens when your macbook battery is about to die while in sleep mode.

[didibus]

Ah yes, I think I've seen this before, it still resumes impressively fast from it, and I think since I normally notice the battery is almost dead it gives itself a good excuse.

[saagarjha]

It's proper hibernation with all your RAM

[didibus]

Right, that's what Linux laptop needs, not hybernation.