acpi_power_off called .... but does not shut down

Nifty Hat Mitch mitch48 at sbcglobal.net
Sun Nov 21 11:04:59 UTC 2004


On Sat, Nov 20, 2004 at 12:46:50AM -0500, Jim Cornette wrote:
> Tom Coburn wrote:
> >has anyone found a fix for the  acpi  problem in FC3 yet?
> >
> >in Fedora Core 3, 
> >when I run shutdown -h now
> >
> >it tries to halt the system, but gets to:
> >
> >power down.
> >acpi_power_off called.
> >
> >then just HANGS there.
> >
> >has anyone found a fix for this yet?

Not a fix but partial solution.  in /boot/grub/grub.conf add acpi=off
to the kernel line.  I expect you will see the same problem on FC2
with the new 2.6.9-1.3_FC2 kernel.... and 2.6.9-1.678_FC3 kernel.

What I think is going on is that the work to get the "modern" acpi 
power management infrastructure is introducing differences with
historic behavior.  If acpi is off then the  apm kernel module is
activated.

It may be that there is now a cleaner line between the two.
Comments  in ..../Documentation/pm.txt 
##
## No sorry, you can not have both ACPI and APM enabled and running at
## once.  Some people with broken ACPI or broken APM implementations
## would like to use both to get a full set of working features, but you
## simply can not mix and match the two.  Only one power management
## interface can be in control of the machine at once.  Think about it..
##

I think the move toward ACPI is necessary for the laptop folk
but there will be some bumpy stuff while it happens.
My gut is that the acpi poweroff/halt sequence is shifting through
a bit map of functions that needs to be ordered or timed differently.
Since I have not looked at this I really do not know...
I am told that some good brains are looking at it.


Examples:

  title Fedora Core (2.6.9-1.3_FC2)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-1.3_FC2 ro root=LABEL=/  acpi=off
        initrd /initrd-2.6.9-1.3_FC2.img

  #
  title Fedora Core (2.6.9-1.678_FC3)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-1.678_FC3 ro root=/dev/VolGroup00/LogVol00 acpi=off
        initrd /initrd-2.6.9-1.678_FC3.img


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