<br><font size=2 face="sans-serif">If you have the "power button doesn't work" problem, try holding the button down for either 6 or 10 seconds (depending on the bios), and you'll find it will power off then. It comes about because the bios has APM (advanced power management) enabled, and the linux kernel you are using has APM support compiled in, and is "hooking" into the BIOS's features for "soft-power-down". The idea behind this is that when you press the power button the hook does a "init 0", and allows the OS to shut itself down first, before powering down the CPU etc. either disable APM in the bios, or in the kernel (or better still both). I mean when working with high-performance clusters you don't want the nodes to "go to sleep"...reduce clock speed of cpu, spin down it's HDD's, turn off its (probably nonexistant) display device, etc etc. You want MAXIMUM response from nodes, irrespective of ho!
w much juice they suck from the power piont. :-)</font>
<br>
<br><font size=2 face="sans-serif">David.</font>
<br>
<br>
<br>
<br><font size=2><tt>Greg Lindahl wrote:<br>
</tt></font>
<br><font size=2><tt>> On Tue, May 29, 2001 at 10:26:39PM -0400, David Vos wrote:<br>
><br>
> > Hmmm. I've seen Windows do that to enough computers I doubt the problem<br>
> > is the power supply. Although to make Linux hang like that is usually a<br>
> > hardware problem.<br>
><br>
> If it weren't for the "power button doesn't work", which I haven't<br>
> seen before, I'd certainly agree that it's likely a random hardware<br>
> problem. You've seen Windows hang machines to the point where the<br>
> power button doesn't do anything? I never have. But then again I don't<br>
> use Windows much.<br>
><br>
> -- g<br>
><br>
> _______________________________________________<br>
> Beowulf mailing list, Beowulf@beowulf.org<br>
> To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf<br>
</tt></font>
<br><font size=2><tt>Well I've seen once or twice on my Linux desktop, it starts out with the keyboard and mouse not working.<br>
Then when I press the power botton, the keyboard resets (led's flash) and then nothing...<br>
</tt></font>
<br><font size=2><tt>But I doubt it is a hardware problem 'cause then it should have happend more often (?)<br>
</tt></font>
<br>
<br><font size=2><tt>-------<br>
Arnold<br>
</tt></font>
<br>
<br>
<br>
<br><font size=2><tt>_______________________________________________<br>
Beowulf mailing list, Beowulf@beowulf.org<br>
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf</tt></font>
<br>
<br>
<br>