[Beowulf] RE: S2466 Wake on Lan working, anyone?

David Mathog mathog at mendel.bio.caltech.edu
Sat Feb 26 19:06:51 EST 2005


> 
> A much clearer demonstration of this failure is to run "shutdown -h 0" 
> and then attempt to power the machine on again at the front pannel switch.
> 
> Apparently the state machine that controls the power on these things 
> becomes locked in it's "shutdown" state and never enters it's "cold and 
> ready to be booted" state.

There is a solution to the problem you described.   When using
a 2.6.x kernel force the "button" module to load by placing the
line

button

in

  /etc/modprobe.preload

reboot
poweroff

At that point you can use the front power switch to restart
the machine after a poweroff.  At least with ACPI built into
the kernel and "acpi=on" present on the boot line. 

Regards,

David Mathog
mathog at caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech
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