ACPI and suspend

[Peter Boy]

Am So, den 22.08.2004 schrieb Russell Coker um 14:03:
> The default configuration of ACPI on my Thinkpad T41p is that closing the lid 
> will turn off the back-light but leave the machine running.
> 
> Is this the desired default behaviour?  I had expected that closing the lid 
> would give the same result that APM has always given and put the machine into 
> suspend mode.

I use a T40p which uses as to my knowledge the same power saving
technology (only a different processor). 

Well, that bebaviour is not desired  :-). There is a problem with the
current ACPI implementation in Linux that lacks implementation of the
client side of ACPI. And there are some inconsistencies between the
Linux ACPI implementation and the IBM Bios (you can see corresponding
warnings im /var/log/messages - search for ACPI).

The easiest way is to suspend ACPI (acpi=no in /etc/grub/grub.conf)
which automatically starts up apmd which will do the job. Otherwise you
have to develop the client side script for your own (see as as an
example /etc/acpi/events/sample.conf). But all the messages I read about
this issue say there is no good solution available yet.



Peter