power off

[John]

Marko Aavik wrote:

>I am quite new to linux and i have no experience with Grub. How can i
>specify 'acpi=force' at boot-time and where i can find log with kernel
>messages?
>
>Thanks again... 
>  
>

I don't know how old your machine is:-)
Most of mine, according to acpi, are "too old" so ACPI disables itself. 
I override it in grub's configuration. This is Sarge, not ubuntu:
title           Debian GNU/Linux, kernel 2.6.7-1-686
root            (hd0,0)
kernel          /vmlinuz-2.6.7-1-686 root=/dev/sda2 ro vga=791 acpi=force
initrd          /initrd.img-2.6.7-1-686
savedefault
boot


The kernel parameters are set on this line:
# kopt=root=/dev/sda2 ro vga=791 acpi=force

and propogated by update-grub. Read the comments in /boot/grub/menu.lst 
for more detail.

Note that other vendors do the same sort of thing a different way.

>
>On Sun, 19 Sep 2004 14:48:55 +0000, John <dingo at coco2.arach.net.au> wrote:
>
>  
>
>>Have you verified that ACPI is actually working? Check for relevant
>>kernel messages.
>>
>>On my test desktop machine I must specify 'acpi=force' at boot-time, and
>>then it can turn the power off.
>>    
>>

The messages in your next message show ACPI is not turned off.
This would've been better though:
dmesg | grep -i acpi



>>I've not yet tried pressing the power button while it's running:-)
>>
>>--
>>    
>>
>
>  
>