[Mageia-dev] latest kernels not powering off machines on shutdown

Thu Aug 9 21:25:23 CEST 2012

'Twas brillig, and Thierry Vignaud at 09/08/12 19:29 did gyre and gimble:
+> On 9 August 2012 20:18, Thierry Vignaud <thierry.vignaud at gmail.com> wrote:
+>>> I've the impression that for some time, kernels do not power off machines
+>>> anymore on shutdown.
+>>> The kernel prints "System halted." but the machine remains powered.
+>>> I've seen that with VMs and with real PCs.
+>>>
+>>> Does someone else see that?
+>>
+>> Humm, in fact it looks like halt == shutdown -H now whereas in the
+>> old days it was equivalent to "shudown -P" (which still works OK).
+>>
+>> Since "halt" is now provided by systemd, this is were the regression
+>> come from...
+> 
+> I would suggests sg like this in order to restore previous behaviour
+
+
+This has already been reported and I've simply closed the bugs and said
+that I will not fix this.
+
+What is the point in having two commands if they both do the same thing?
+I actually find the halt command useful for ensuring the correct thing
+happens on shutdown (e.g. that we re-enter the initrd and pivot root out
+of the main filesystem to ensure /usr us unmounted and LVM/raid etc.
+properly tidied up). If you cannot issue a halt, it's nigh on impossible
+to debug these things, so a patch to systemd would be IMO be a very bad
+idea. I wouldn't necessarily be completely against a patch that made
+running "halt" work differently to "systemctl halt", but such a patch
+would likely be ugly and it's certainly not going to be accepted
+upstream and it means inconsistent behaviour and as a result I'd rather
+just let people adapt to the current (and IMO correct) behaviour - I
+still maintain the old behaviour was broken and this that systemd simply
+restores what the behaviour should have been all along.
+
+Col
+
+
+-- 
+
+Colin Guthrie
+colin(at)mageia.org
+http://colin.guthr.ie/
+
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+