Bug 788304

Summary:	systemd-40-1.fc17 breaks reboot/halt/poweroff/shutdown ...
Product:	[Fedora] Fedora	Reporter:	Michal Jaegermann <michal>
Component:	systemd	Assignee:	systemd-maint
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	johannbg, metherid, mschmidt, notting, plautrba, systemd-maint
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Hardware:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2012-02-08 03:56:02 UTC	Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Michal Jaegermann 2012-02-08 01:27:35 UTC

Description of problem:

After updating to systemd-40-1.fc17 an attempt to execute commands like
'reboot' and/or other related results in dump of systemd units into a pager on a screen and that is it. That means that effects are the same as if a bare 'systemctl' would be typed. Reverting to systemd-39-3.fc17 unbreaks that.

'systemctl reboot' does have desired effects but, adding an insult to injury, this runs into a bug 788300 and one is dropped into "debugging shell". There systemd leaves any pretense of a sanity and every attempt to communicate with it, in blind, ends up with a "Failed to get D-Bus connection. No connection to service manager" response and one is totally stuck. A nice design of a critical component!

Version-Release number of selected component (if applicable):
systemd-40-1.fc17

How reproducible:
all the time

Additional info:
It appears that "halt", when it can be coaxed to work, does stop the system but it does not bother to turn off a power. One needs and explicit "poweroff" for the later. For a long time "halt" and "poweroff" were really synonymous and this surprised me. AFAICS manpages do not bother to define what is expected from these actions leaving that to be guessed. If all of sudden these two are supposed to be different then at least a mention in docs would be in order. I am not sure when they diverged as, by a force of habit, I was usually using 'shutdown -h now'. It is very far from clear what 'systemctl ...' equivalent of that would be.

Comment 1 Kay Sievers 2012-02-08 03:56:02 UTC


*** This bug has been marked as a duplicate of bug 788107 ***

Comment 2 Michal Schmidt 2012-02-08 07:49:00 UTC

(In reply to comment #0)
> It appears that "halt", when it can be coaxed to work, does stop the system but
> it does not bother to turn off a power.

The change from upstart's behaviour was documented in F15 release notes:
http://docs.fedoraproject.org/en-US/Fedora/15/html/Release_Notes/sect-Release_Notes-Changes_for_SysAdmin.html#sect-RelNotes-Boot
and in Fedora's systemd wiki page:
https://fedoraproject.org/wiki/Systemd#How_to_power_off_the_machine_.3F

It is true that the man page does not define the semantics of the terms, but it does refer to Halt and Power-off as distinct actions.