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Re: problematic poweroff on shutdown [Fwd:]

-------- Original Message --------
Subject: 	Re: problematic poweroff on shutdown
Date: 	Mon, 02 Jan 2012 08:42:08 -0800
From: 	Don Juan <donjuansjiz@gmail.com>
To: 	Curt <curty@free.fr>

On 01/02/2012 08:34 AM, Curt wrote:
 Periodically, for no reason I can fathom, or trace to a specific cause,
 when I shutdown my machine, it fails to power off.  The shutdown
 procedure unrolls, or unfurls, as expected, but at the point where it
 says at the console "Will now halt," instead of a power off taking
 place, the console displays an additional message: "Power off".  At that
 point, my only alternative is to press the power buttom at the front of
 the machine for five seconds, which turns the machine off (this seems
 a gentler alternative to yanking out the power cord from the socket, as the
 psu on this 'puter has no power switch).

 How would I go about trouble-shooting this erratic behavior?

 I hijacked another thread in which I posited that the problem was
 related to plugging in an external usb hard drive.  This supposition has
 turned out to be false (post hoc ergo propter hoc), as so many of my
 suppositions do these days.


 There's nothing in the logs to distinguish the no poweroff shutdowns
 from the poweroff ones (I don't think; I have looked).

you could always do alt+sysrq REISUB that's a gentler way to shut down
(reboot actually) in an extreme case like that, then you could always
edit grub and go directly to init 3. Depending on your kernel adding "kernel.sysrq = 1" will activate it REISUB
But I think you have to enable it
in sysctl.conf, if I remember correctly off the top of my head. What
kind of video card are you running. Have you tried switching to another
console when it freezes?

If its a nvidia or ati card you could have the dreaded issues of
xorg-server not playing nicely. I just recently had to pin xorg-server
in sid to be able to cleanly shutdown and reboot again. There are a
bunch of bugs open in regards to nvidia and ati and most are in relation
to xorg-server.

Best guess I can make without info

Sorry sent this earlier but I did not send the reply to the list.

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