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System76 or Framework laptop?
(lemmy.fmhy.ml)
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this post was submitted on 19 Jul 2023
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One solution I've seen has been to enable "hybrid sleep", where you can have it sleep for some period of time (30m) and afterward go to hibernate.
I still need to check in on it, but one of the biggest issues with sleep on Framework laptop is that the usb-c adapters (like HDMI) passively draw power. If you use 4 usb-c (or just leave it empty), you have better sleep experience.
Hibernate is it's own challenge in Linux right now as lockdown mode doesn't work with hibernate (and I think a lot of distros use lockdown mode by default for security). I had to patch the kernel to enable this: https://gist.github.com/kelvie/917d456cb572325aae8e3bd94a9c1350
I was able to get hibernate working on Ubuntu with a few config changes. I'm using a swapfile which is the default these days and it takes care of security when used with disk encryption.
Given that Intel no longer supports S3, hybrid sleep or suspend-then-hibernate is the solution indeed. It works pretty well on my end. I'm using the latter with a 3-hour suspend window. Very rarely I end up cold-booting. Hybrid-sleep is foolproof for those that absolutely can't tolerate lost state.