Atemu

There’s https://gitlab.com/android_translation_layer/android_translation_layer which can already run BeatSaber apparently.

I think games specifically might be easier than most other apps as they are probably often little more than a 2D canvas displaying a regular Linux app with quite limited use of android-specific APIs.

Inconsistent time before sleep is likely the kernel waiting for IO to sync to disk.

Not going to sleep at all implies a serious issue that prevented the kernel from doing so. Check your logs!

Suspend reliability greatly depends on the firmware of your specific device as it controls the wakeup.

On my Framework 16 for instance, it is very reliable these days. I can’t remember the last time it woke up unexpectedly and I’m not sure whether it happened even once since the firmware update that fixed a major oversight in keyboard wakeup (waking when a key was pressed through a closed lid).

In Hyprland, how it works is that you define the screen lock command (e.g. swaylock) in hypridle and that gets wired into logind somehow such that you can loginctl lock-session.

I then (also in hypridle) define a before sleep hook that locks the session.

I believe the proper way to do this would be to run your lockscreen as a systemd unit that is WantedBy and Before suspend.target. This would in theory take care of making it idempotent and reliably show the lockscreen before initiating suspend.
A friend of mine has this sort of setup and, while it is reliable, the lockscreen is still racy and sometimes only triggers after suspend. Might be the lockscreen unit not signalling its readiness to systemd properly though.

Thank you!

I’ve found the Seedstudio thing after posting this too and it looks like the thing I’d be looking for!

What’s your experience w.r.t. coverage?
Obviously that highly depends on where exactly you are – you certainly aren’t going to have coverage in the outback – but I’m mostly concerned with places where people actually go and would take my bag/laptop/bicycle to. 'Stralia is going to generally be quite different from Germany too of course but it would be a good reference point from which I could extrapolate.

Are there any (ideally waterproof) compact devices with long battery life (months~years)?

On the website I only found a long list of supported devices with brand name search and protocol type. grep showed no LoRaWAN devices though?

My use-case is theft tracking. I only need the device to be able to locate itself after a theft actually occurred and I request it remotely. (Perhaps also periodically with very low frequency.)