[systemd-devel] systemd hibernator generator does not function on default Fedora install

[Lennart Poettering]

On Wed, 20.04.16 08:00, James Hogarth (james.hogarth at gmail.com) wrote:

> Regardless of how the hibernate generator might potentially be changed to
> attempt to locate a valid swap partition with hibernate data, or how
> difficult that may be given the nature of running in an initrd and as a
> generator, we still need to follow the kernel requirements for
> suspend-to-disk.
> 
> The documented way there is resume= so I feel that's the best way to direct
> the Fedora bug as it stands.
> 
> If the anaconda guys disagree then I think the best course of action to
> avoid unexpected data loss is to have upower not default to HybridSleep but
> go straight to shutdown.
> 
> I'll update the bug comments later today with the results of this thread.

I am still open to add searching for the resume swap partition to the
generator, but only where this may be done reliably, i.e. GPT, but not
MBR. And we should either define a new GPT partition type UUID for
"hibernation swap", or reuse the swap GPT partition type UUID but then
set a flag in it which marks it for use in resume= usage.

Given that Windows mandates EFI in modern laptops (and thus GPT), I am
pretty sure you can cover large majority of systems with that. But
again, it won't be a 100% solution, since there are of course people
who still use MBR.

Lennart

-- 
Lennart Poettering, Red Hat