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2014-12-01 12:40 GMT-06:00 <meino.cramer@×××.de>: |
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> Rich Freeman <rich0@g.o> [14-12-01 19:16]: |
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>> On Mon, Dec 1, 2014 at 12:46 PM, <meino.cramer@×××.de> wrote: |
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>> > What is the difference here? |
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>> > Isn't it, that all shutdown applications only send some instructions |
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>> > to the kernel and the kernel is the main actor in bringing the system |
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>> > down? |
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>> > |
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>> |
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>> About the only thing the kernel might have a role in is turning off |
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>> the power. Almost all of the shutdown logic is in userspace and it |
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>> isn't surprising that copying scripts between distros is going to |
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>> cause issues since the whole service management component varies |
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>> GREATLY across distros. Maybe if you're using systemd you could copy |
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>> between distros since that is more standardized, but even then there |
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>> can be differences. |
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>> |
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>> In a traditional sysvinit system usually shutting down is accomplished |
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>> by changing runlevels, which immediately starts/stops anything in |
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>> inittab (generally only gettys) and calls a script which does all the |
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>> actual work. |
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>> |
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>> If the issue is that userspace shuts down fine but the system reboots |
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>> instead of powering off that could be a couple of things which |
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>> shouldn't be too hard to track down. An obvious question is whether |
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>> the hardware even supports being powered off in the first place - this |
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>> isn't an ATX motherboard. Powering off a system can sometimes be |
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>> remarkably tricky depending on how standardized the platform is. I |
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>> was reading an article on it a few years ago and I think linux |
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>> actually implements several different mechanisms that get tried in |
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>> series, with the final fallback being a halt without powering off. |
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>> |
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>> -- |
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>> Rich |
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>> |
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> |
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> Hi Rich, |
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> |
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> AH! :) Thanks for the informations! |
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> |
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> From what you say, it is a kernel problem, since the kernel |
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> is the one who switches off the lights... |
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> |
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> But even if I use the same kernel as used for the Debian system |
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> it does not work... |
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> |
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> May be shutdown says "power off the system" and the kernel understands |
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> "reboot the system"? |
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> I mean: In principle the kernel would be able to poweroff the system |
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> but there are some communications difficulties with the guys from |
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> userland? ;) |
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> |
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> Best regards, |
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> Meino |
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> |
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> |
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> |
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I've always turned off across linux distros (BSD is other story) with: |
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|
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# shutdown -hP now |
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|
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the help says : |
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-h: halt after shutdown. |
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-P: halt action is to turn off power. |
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-H: halt action is to just halt. |
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|
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I've not seen you using the -P flag. |
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