Re: [REGRESSION][BISECTED] Dell Precision 7780 wakes up on its own from suspend

[Askar Safin <safinaskar@gmail.com>]

Andy, Mario and others.

During these months I found zillions of suspend and hibernation related bugs.

It seems hibernation is not well supported.

For example, it seems hibernation is not supported on Chromebooks [1].

And Fedora intentionally disables it by default. [2]

Other operating systems do similar thing. Hibernation is hard-to-enable
in Windows [3]. macOS on Apple Silicon hibernate in very limited scenarios [4].

But I still use hibernation.

So, I have an idea. Maybe we should remove as many as possible hibernation-related
code from kernel to make sure that remaining code is easy to support? I. e.
maybe we should remove some even-more-obscure-than-hibernation features,
such as hybrid sleep mode, to make normal hibernation easier to maintain?

If you like this idea, then I will happily write patches for removing
some hibernation-related features, such as hybrid sleep mode.

Other ideas:
- Remove uswsusp (i. e. kernel/power/user.c ) in favor of normal hibernation
(or vice versa, i. e. remove normal hibernation and keep uswsusp only)
- Remove hibernation to swap partition and keep hibernation to swapfile only
(or vice versa)
- Decouple hibernation from swap completely (i. e. hibernate not to swap
partition, but to special designated partition or file)

In short, just tell me what should be removed, and I will happily remove it.

[1] https://www.reddit.com/r/chromeos/comments/y5pol9/anyone_know_what_the_status_of_hiberman_hibernate/
[2] https://pagure.io/fedora-workstation/blob/master/f/notes/hibernationstatus.md
[3] https://www.groovypost.com/howto/enable-hibernate-mode-windows-10/
[4] https://www.reddit.com/r/chromeos/comments/y5pol9/comment/ism352k/

-- 
Askar Safin