I can't turn off my pc

[Mumia W.]

On 09/18/2008 10:57 PM, Juan Ignacio Rondini Pareja wrote:
> Hello, I installed ubuntu about 3 weeks ago and all have been ok, but one 
> day the pc did not turn off. When I try to do it, no matter the way, the 
> screen turn black and the computer remain on. I have to turn it off manualy, 
> by pressing the button. This happens also if a try to restart the pc. I hope 
> that you can help me. Thanks.
> 
> 

Please give us the output of these commands:

uname -a
cat /etc/issue
cat /proc/cmdline
/sbin/lsmod | grep button
ps ax | grep acpid