Re: System hang when trying to enter sleep/standby state

I would recommend never, ever doing 'echo 5 > /proc/acpi/sleep', 
especially if you're trying to suspend the system. 

It's not worse than pushing the power button on a normal system
(or hold the power button on an ACPI system).

ACPI should not allow a user to write '5' to that file. It used to be that 
way, but someone clever decided that that interface should support _all_ 
sleep states. (It might have been me, in one of my finer moments). 

The regular user can't write anything to that file - this must be
root. He's supposed to know what he's doing. If he wants to turn the
machine off without halting the system, then that's his choice. Think
of something like an embedded system to control a machine. Many 
machines have an emergency off whith a huge red button. This is the
software version of this red button. Your software can press this
if you thing that's necessary.

Andy, I recommend removing that from 2.4, and I'll send you a patch for 
2.5..

I'd like to have it in. I don't know what I could ever use it for,
but I'd really prefer to have this possibility.


Jens

-- 
Jens Haug
IKFF Universität Stuttgart              Tel. 0711/685-6422
Pfaffenwaldring 9                       Fax  0711/685-6356
70550 Stuttgart	                haug-X6ztD3ggwzuBAmxm6OvjtTjhTm2NLCe8@public.gmane.org



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