help me please

[ac]

Donn wrote:
>> hi,im totally new in linux.
>>
> Hello, welcome.
>> i installed kubuntu a week 
>> ago, but i met a trouble: i cannot turn off my PC. i
>> click log out, then click turn off, soon the monitor
>> turns black and displays several lines seems like it
>> informs what the system do at that time.the last line
>> write will now halt, but my PC never turn off. 
>>
> That sounds like a horribly common bug:
> https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.17/+bug/43961
> 
> I don't really know what to suggest. Try this:
> 1. Open a konsole (Alt + F2, konsole, enter)
> 2. Try to shutdown the machine by typing:
> sudo shutdown -h now

or
sudo /sbin/shutdown -h now
[...]

> Try holding the power button down for over 6 seconds.

I find some of my machines need a power button press to finally turn 
the power off
-- 
ac