linux-kernel - Re: halt does not shut the system down

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Message-ID: <4714979C.5010103@free.fr>
Date:	Tue, 16 Oct 2007 12:51:08 +0200
From:	John Sigler <linux.kernel@...e.fr>
To:	linux-acpi@...r.kernel.org
CC:	linux-kernel@...r.kernel.org, robert.moore@...el.com,
	len.brown@...el.com
Subject: Re: halt does not shut the system down

John Sigler wrote:

> Alexey Starikovskiy wrote:
>
>> Could you please open bug at bugzilla.kernel.org and put all these
>> files there?
>
> http://bugzilla.kernel.org/show_bug.cgi?id=9148
> 
> Writing 15361 (i.e. 0x3C01) to ACPI_REGISTER_PM1A_CONTROL appears to
> hang my system in acpi_os_write_port(). What can I do about that?

Another observation: if I connect a screen to the system's VGA port, 
when I call 'poweroff' the screen goes into power saving mode. This 
seems to indicate that the integrated video card is properly shut down.

So the fans keep spinning, the LEDs keep shining, the LCD keeps 
displaying, but the video card is shut down?

Might this help pinpoint the problem?

Regards.
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