linux-kernel - Re: ACPI "Soft-off" power button only rebooting system, not powering off

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Date:	Thu, 18 Sep 2008 08:12:47 -0400
From:	Stephen Clark <sclark46@...thlink.net>
To:	Pavel Machek <pavel@...e.cz>
CC:	Andrew Paprocki <andrew@...iboo.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: ACPI "Soft-off" power button only rebooting system, not	powering
 off

Pavel Machek wrote:
> On Wed 2008-09-17 08:33:50, Andrew Paprocki wrote:
>> On Wed, Sep 17, 2008 at 6:18 AM, Pavel Machek <pavel@...e.cz> wrote:
>>> On Wed 2008-09-17 00:50:03, Andrew Paprocki wrote:
>>>> I have an AMD / Award BIOS based system which does not properly shut
>>>> off when I hold down the power button for 4 seconds. The BIOS is
>>>> configured to have "Soft-off" set to "Delay for 4 seconds" which is
>>>> supposed to power the machine off if the button is held that long.
>>>>
>>>> I first thought this could be a BIOS bug, but this *only* appears to
>>>> happen while Linux is running. If the computer is running WinXP, it
>>> Well, so the BIOS is broken. 4second hold should power down the
>>> machine regardless of the operating system.
>> Yes, I agree.. I just find it strange that it works on the BIOS screen
>> as well as in GRUB, but as soon as Linux boots, it no longer works.
>> Since it works under WinXP, there must be some way to get it to work
>> properly from the OS side even it if means working around the bug
>> somehow.
> 
> Try noapic/nolapic/nosmp etc... and ask your vendor to fix the bios ;-).
> 
Why do you say it is the BIOS when it shuts down properly from the GRUB prompt 
or from in WINXP?

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