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

[Michael Biebl]

Hi Lennart

2016-04-21 12:11 GMT+02:00 Lennart Poettering <lennart at poettering.net>:
> On Thu, 21.04.16 02:50, Michael Biebl (mbiebl at gmail.com) wrote:
>
>> 2016-04-21 0:56 GMT+02:00 Michael Biebl <mbiebl at gmail.com>:
>> On second thought, maybe not such a good idea as this would break
>> hibernate on alternate initramfs generators, like initramfs-tools,
>> which don't require resume= to be set on the kernel command line.
>
> So, what does initramfs-tools do instead? Does it actively search for
> a hibernation partition? And how long does it look for one? Or does it
> write the resume partition into the initrd image?

Our installer creates a file
/etc/initramfs-tools/conf.d/resume which contains the name of the swap
partition that was created during system installation.
This file is embedded in the initramfs and used to resume the system
from hibernate.
http://anonscm.debian.org/cgit/kernel/initramfs-tools.git/tree/hooks/resume#n19

Such a file looks like
$ cat /etc/initramfs-tools/conf.d/resume
RESUME=UUID=c0d2bc19-898f-4306-a734-85e547e249f0

But it also does some autodetection, if RESUME is not set.
http://anonscm.debian.org/cgit/kernel/initramfs-tools.git/tree/hooks/resume#n42

Regards,
Michael

-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?