10-28-2009
Check first that it really is hung by telneting or sshing from another machine- it may just be the console. Hook up a serialconnection - maybe it's just the nic and the console.
If it really is frozen solid, then hardware is suspect: power supply, scsi termination, scsi cables, motherboard. In the old days, slightly low power from a defective power supply could do this - I don't know if that's still true with modern m/b's.
A kernel call that is completely masked and is stuck in a loop would create a "frozen" machine. That's pretty unlikely.
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LEARN ABOUT DEBIAN
pm-powersave
PM-POWERSAVE(8) pm-utils User Manual PM-POWERSAVE(8)
NAME
pm-powersave - Put your computer into low power mode
SYNOPSIS
pm-powersave [{true | false}]
DESCRIPTION
This manual page documents briefly the pm-powersave command.
pm-powersave can be used to set your system into low power mode.
OPTIONS
true
Put the computer into low power mode to reduce energy consumption and extend your laptop's battery life.
false
Turn off low power mode.
FILES
/etc/pm/power.d/, /usr/lib/pm-utils/power.d/
When you run pm-powersave it combines the scripts in these two directories and executes them in sorted order. If both directories
contain a script with the same name, the one in /etc/pm/power.d/ has a higher precedence and only this one will be executed.
Therefore to disable a script from /usr/lib/pm-utils/power.d/ simply create an empty file in /etc/pm/power.d/ with the same name and
without the executable bit set.
SEE ALSO
pm-suspend(8), pm-hibernate(8)
AUTHOR
Michael Biebl <biebl@debian.org>
Manpage author.
COPYRIGHT
Copyright (C) 2007 Michael Biebl
This manual page was originally written for the Debian(TM) system, and has been adopted by the pm-utils project.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or (at
your option) any later version published by the Free Software Foundation.
pm-powersave Mar 5, 2007 PM-POWERSAVE(8)