Bug 73122

Summary:	logind claims that hibernate is supported even if there is no swap
Product:	systemd	Reporter:	post+fdo
Component:	general	Assignee:	systemd-bugs
Status:	RESOLVED WORKSFORME	QA Contact:	systemd-bugs
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description post+fdo 2013-12-29 14:00:31 UTC

I do not have a swap partition set up for my system. Nevertheless, logind claims (in its d-bus interface) that hibernation is supported, which is clearly wrong.

This is a regression compared to plain upower, which correctly recognizes that I don't have swap and sets its d-bus properties appropriately.

Comment 1 Zbigniew Jedrzejewski-Szmek 2014-01-11 15:30:55 UTC

I have no swap here, so suspend is possible, but not hibernation.

$ gdbus call --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --method org.freedesktop.login1.Manager.CanSuspend
('challenge',)
$ gdbus call --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --method org.freedesktop.login1.Manager.CanHibernate
('na',)

$ sudo swapon -av
$ gdbus call --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --method org.freedesktop.login1.Manager.CanHibernate
('challenge',)

$ sudo gdbus call --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --method org.freedesktop.login1.Manager.CanHibernate
('yes',)

Quoting http://freedesktop.org/wiki/Software/systemd/logind/: "If "na" is returned the operation is not available because hardware, kernel or drivers do not support it."

I see no bug here. I'm closing this, because the code looks correct and rather straightforward. If you have a specific example where this doesn't work (with recent git), please reopen with some more details.

Comment 2 post+fdo 2014-01-11 15:37:56 UTC

I get

$ gdbus call --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --method org.freedesktop.login1.Manager.CanHibernate
('yes',)

even though I have no swap:

$ cat /proc/swaps 
Filename                                Type            Size    Used    Priority

This is with systemd 204 on Debian testing.
Please tell me which other details you need.

Comment 3 Zbigniew Jedrzejewski-Szmek 2014-01-11 15:46:29 UTC

(In reply to comment #2)
>> ... with recent git ...
> This is with systemd 204 on Debian testing.
Sorry, 204 is ancient history for the upstream bug tracker. With a bit of luck http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=727708 will be resolved soon and Debian can move to something more recent.

Comment 4 post+fdo 2014-01-11 16:00:24 UTC

I see. I'll re-test this when/if Debian has a more recent version, and report my findings here. Thanks for your replies.

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