From: Dave Jones <davej@codemonkey.org.uk>
To: Alex Bennee <alex@braddahead.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Ctrl-Alt-Backspace kills machine not X. ACPI?
Date: Wed, 4 Dec 2002 14:33:37 +0000 [thread overview]
Message-ID: <20021204143337.GK647@suse.de> (raw)
In-Reply-To: <1039012040.2588.20.camel@cambridge.braddahead>
On Wed, Dec 04, 2002 at 02:27:19PM +0000, Alex Bennee wrote:
> I was under the impression that once Linux took over from the BIOS it
> had complete control of the system, including the interrupt/exception
> table. I am assuming some sort of interrupt or exception must be being
> generated by this keypress that runs some BIOS code.
It's likely an SMM event, which Linux doesn't even get to see.
The BIOS handles it appropriately. The chipset has a bit you can
flip to disable this 'feature', but there was a caveat iirc, something
like 'it turns itself back on every so often'. I'll let Egbert say
more about it, as he had the relevant datasheet.
Dave
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
next prev parent reply other threads:[~2002-12-04 14:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-04 12:45 Alex Bennee
2002-12-04 13:15 ` Dave Jones
2002-12-04 13:59 ` John Bradford
2002-12-04 14:27 ` Alex Bennee
2002-12-04 14:33 ` Dave Jones [this message]
2002-12-04 14:47 ` Michael Abshoff
2002-12-04 15:08 ` Alex Bennee
[not found] ` <3DEDF74D.2090204@enib.fr>
[not found] ` <1039007556.2217.30.camel@cambridge.braddahead>
2002-12-04 18:35 ` XI
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