Date: Thu, 4 Dec 2008 03:42:51 -0800 (PST) From: Unga <unga888@yahoo.com> To: freebsd-questions@freebsd.org Subject: Re: FreeBSD cannot power down Message-ID: <289102.92495.qm@web57001.mail.re3.yahoo.com> In-Reply-To: <706654.84147.qm@web57001.mail.re3.yahoo.com>
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--- On Tue, 12/2/08, Unga <unga888@yahoo.com> wrote:
> From: Unga <unga888@yahoo.com>
> Subject: FreeBSD cannot power down
> To: freebsd-questions@freebsd.org
> Date: Tuesday, December 2, 2008, 11:22 PM
> Hi all
>
> After a kernel recompilation on i386 RELENG_7 (not the
> latest), I cannot power down the machine.
>
> kldstat shows acpi.ko is loaded.
>
> It used to switch off but now the "shutdown -p
> now" halts the system with following messages:
> The operating system has halted.
> Please press any key to reboot.
>
> What else could I check to identify the cause?
>
> Appreciate your ideas on this.
>
I had a look at source code. The program flow seems to be is as follows:
shutdown => (signals) init => reboot() => boot() => shutdown_final => shutdown_halt() => cpu_halt()
I did not see which function is called to request a power down.
The __asm__ ("hlt") doesn't power down, isn't it?
Could you guys help me to identify how shutdown request a power down.
Many thanks in advance.
Unga
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