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<H1>[Mageia-dev] latest kernels not powering off machines on shutdown</H1>
<B>Pascal Terjan</B>
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TITLE="[Mageia-dev] latest kernels not powering off machines on shutdown">pterjan at gmail.com
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<I>Thu Aug 9 21:32:04 CEST 2012</I>
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<PRE>On Thu, Aug 9, 2012 at 8:25 PM, Colin Guthrie <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">mageia at colin.guthr.ie</A>> wrote:
><i> 'Twas brillig, and Thierry Vignaud at 09/08/12 19:29 did gyre and gimble:
</I>>><i> On 9 August 2012 20:18, Thierry Vignaud <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">thierry.vignaud at gmail.com</A>> wrote:
</I>>>>><i> I've the impression that for some time, kernels do not power off machines
</I>>>>><i> anymore on shutdown.
</I>>>>><i> The kernel prints "System halted." but the machine remains powered.
</I>>>>><i> I've seen that with VMs and with real PCs.
</I>>>>><i>
</I>>>>><i> Does someone else see that?
</I>>>><i>
</I>>>><i> Humm, in fact it looks like halt == shutdown -H now whereas in the
</I>>>><i> old days it was equivalent to "shudown -P" (which still works OK).
</I>>>><i>
</I>>>><i> Since "halt" is now provided by systemd, this is were the regression
</I>>>><i> come from...
</I>>><i>
</I>>><i> I would suggests sg like this in order to restore previous behaviour
</I>><i>
</I>><i>
</I>><i> This has already been reported and I've simply closed the bugs and said
</I>><i> that I will not fix this.
</I>><i>
</I>><i> What is the point in having two commands if they both do the same thing?
</I>><i> I actually find the halt command useful for ensuring the correct thing
</I>><i> happens on shutdown (e.g. that we re-enter the initrd and pivot root out
</I>><i> of the main filesystem to ensure /usr us unmounted and LVM/raid etc.
</I>><i> properly tidied up). If you cannot issue a halt, it's nigh on impossible
</I>><i> to debug these things, so a patch to systemd would be IMO be a very bad
</I>><i> idea. I wouldn't necessarily be completely against a patch that made
</I>><i> running "halt" work differently to "systemctl halt", but such a patch
</I>><i> would likely be ugly and it's certainly not going to be accepted
</I>><i> upstream and it means inconsistent behaviour and as a result I'd rather
</I>><i> just let people adapt to the current (and IMO correct) behaviour - I
</I>><i> still maintain the old behaviour was broken and this that systemd simply
</I>><i> restores what the behaviour should have been all along.
</I>
The behavior has been incorrect for more than 10 years and everyone
uses it like that.
What is the point of changing the behavior in a way that will make it
do something bad and annoying for most users?
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