FreeBSD 6.1 & 6.2 hanging and/or spontaneous rebooting

Chuck Swiger cswiger at
Sat Jan 27 00:18:23 UTC 2007

On Jan 26, 2007, at 4:04 PM, Joe Vender wrote:
> On Friday 26 January 2007 17:41, Tore Lund wrote:
>> You issue the command "shutdown -p now".  This should work with  
>> any BIOS
>> that has apm or acpi, as far as I know.
> I've tried that, but it didn't power off, just got to the halted  
> step. What
> about issuing the "Shutdown computer" from KDE logout? Shouldn't it  
> power off
> the computer?

The GUI commands within KDE are going to invoke the command-line  
shutdown command with the appropriate arguments.  What may be going  
on is that your old hardware only supports the older form of power  
management/shutdown mechanism, called APM, rather than the newer  
APCI.  You might find that reading "man 4 apm" and "man acpi" will  
give you some hints on debugging the issue.  It might help to try  
updating your machines BIOS, or to recompile a kernel with ACPI  
disabled but the older APM enabled, and see whether that gets you  

The fact that you can shutdown within Linux suggests that your  
hardware does have the capability, so it's just a matter of figuring  
out what's different.  Note that you might find that trying to run  
FreeBSD 4.11 to be informative, as the defaults for that older  
version might correspond with your hardware better, although, 4.11 is  
at the end of it's supported lifespan...


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