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Old 07-22-2009, 01:17 PM   #1
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System halts on shutdown ubuntu 9.04

Just installed Ubuntu 9.04 last night. All seems perfect except on shutddown. It seems to go through all shutdown processes but right about the time you expect the computer to turn off a message says: "system halted [4027.514883]" Have Googled it but no matches. If I just push the on/off button at that point it shuts off immediately and starts up fine next time, so may not be a problem.
Old 07-22-2009, 01:35 PM   #2
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If it's an older computer and has acpi power management put acpi=force in the second line of grub's ubuntu menu sometimes that will work. if you have apm power management I'm not sure but I don't think the newer kernels support apm. have a computer with apm and couldn't get it to work with any kernel above version 2.6.21

Last edited by colorpurple21859; 07-22-2009 at 01:38 PM.
Old 07-22-2009, 01:44 PM   #3
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Don't have a cure. Have Ubuntu on 3 machines. The oldest of them (P2-400mHz, built in 1997) acts the same way. Gets the system halt message, does not power off. Not a problem except its just a minor thing to turn the power off with the power button.

Has something to do with the power management. Some Linux distributions such as Puppy power off the machine when shutdown is selected.
Old 07-22-2009, 02:08 PM   #4
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If I just push the on/off button at that point it shuts off immediately and starts up fine next time, so may not be a problem.
It's not a "problem" if you can be bothered to reach for the power button. Once it says "system halted" it is safe to power it off, by any method.

Otherwise, I agree, it's an ACPI problem, and this can usually be solved by adding acpi options to your kernel boot line in /boot/grub/menu.lst

Kernel boot options
Old 05-29-2010, 04:43 AM   #5
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Shutting down automatically

There seems to be no solution posted so I'll post what I did to make Puppy 5 power off without having to manually hold the button.

Basically the acpi=force addition to the mem.lst doesn't work on some older computers because some older APM based machines won't power off if they don't have the apm=power-off kernel option.

/etc/rc.d/rc.sysinit has a modprobe apm line (could be line 247 or 249 or a near neighbour) and this can be edited from:

[ ! -d /proc/acpi ] && modprobe apm #v406


[ ! -d /proc/acpi ] && modprobe apm power_off=1 #v406

Which makes it shut off properly. I don't knw if this can be used to inform a shutdown in Ubuntu or not.

Thanks to a user at Puppylinux discussion forum called 'Noabody' for that workaround.


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