how to poweroff ??
 

I do have slackware 10.0 on my laptop. When I use shutdown command or shutdown -h or even poweroff and halt command the system stops at the last stage and I have to turn off the laptop manually. What would be the problem?

Is it using acpi or apm? I'm not familiar with acpi, but if it supports apm, you must disable acpi support in the kernel and enable apm. With apm enabled the poweroff command switches the power off.

as does acpi, I think mine(using debian 3.1, with acpi) at the end says something like
then it shuts down

acpi apm
 

I am not familiar with these acpi and apm thing. How may I check that whether my kernel supports apm or acpi and what should I do to reconfigure kernel?

If you are using the default kernel from Slackware (2.4.x) you can install apmd using swaret and then edit /etc/rc.d/rc.M and uncomment the lines relevant to apm.

Re: how to poweroff ??
 

It could very well be that you have to pass the parameter "nolapic" to the kernel. This is done in the config-file for your bootloader.

/TLV