Re: halt does not shut the system down

[John Sigler <linux.kernel@free.fr>]

Hello Remy,

Remy Bohmer wrote:

> John Sigler wrote:
>
> > When I run 'halt' the kernel prints:
> > Halting.
> > Shutdown: hdc
> > ACPI: PCI interrupt for device 0000:01:05.0 disabled
> > ACPI: PCI interrupt for device 0000:01:04.0 disabled
> > ACPI: PCI interrupt for device 0000:01:03.0 disabled
> > ACPI: PCI interrupt for device 0000:01:02.0 disabled
> > Power down.
> > acpi_power_off called
> >
> > But the system does not shut down. (The fans keep spinning, the LEDs
>
> I have seen this behavior earlier on a system with the SMI interrupt
> disabled. I do not know if this the case here, it is just a hint.

Thanks for the suggestion. I didn't see anything related to SMM in the 
BIOS menus. However, the system has real-time constraints. Thus, I'd 
turn SMM off if I knew how :-)

   Phoenix - AwardBIOS v6.00PG, An Energy Star Ally
   Copyright (C) 1984-2003, Phoenix Technologies, LTD
*** NAMB-3140 BIOS V1.20 ***
03/27/2006-i845GV-W83627-6A69VAKHC-00

> By the way, some distros bring the CPU in a halted state on a 'halt'
> command, instead of powering off (actually very logical). For real
> powering off these distros require the obvious 'poweroff' command.

Good suggestion. I'm using sysvinit-2.86
http://freshmeat.net/projects/sysvinit/

AFAIU, poweroff is equivalent to halt -p

halt (no option) calls reboot(RB_HALT);
poweroff or halt -p calls reboot(RB_POWER_OFF);
man 2 reboot

Alas, when I run 'poweroff' the kernel prints the same information:

Halting.
Shutdown: hdc
ACPI: PCI interrupt for device 0000:01:05.0 disabled
ACPI: PCI interrupt for device 0000:01:04.0 disabled
ACPI: PCI interrupt for device 0000:01:03.0 disabled
ACPI: PCI interrupt for device 0000:01:02.0 disabled
Power down.
acpi_power_off called

Regards.
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