linux-kernel - Re: [PATCH v3] Enable A20 using KBC for some MSI laptops to fix S3 resume

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Message-Id: <201211052135.20009.linux@rainbow-software.org>
Date:	Mon, 5 Nov 2012 21:35:19 +0100
From:	Ondrej Zary <linux@...nbow-software.org>
To:	hpa@...or.com
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] Enable A20 using KBC for some MSI laptops to fix S3 resume

On Friday 26 October 2012 10:56:44 Ondrej Zary wrote:
> Some MSI laptop BIOSes are broken - INT 15h code uses port 92h to enable
> A20 line but resume code assumes that KBC was used.
> The laptop will not resume from S3 otherwise but powers off after a while
> and then powers on again stuck with a blank screen.
>
> Fix it by enabling A20 using KBC. Affected laptop list and DMI data are
> from bug reports at Ubuntu Launchpad.
>
> Also add kernel parameter to easily activate this quirk on any system.
>
> Only compile tested. The original patch was tested with EX600 and PR200.
>
> Fixes https://bugzilla.kernel.org/show_bug.cgi?id=12878

The bug was marked as RESOLVED CODE_FIX but I wonder what happened to this 
patch. Was it applied? Or is someone working on a better way to fix this 
problem?

-- 
Ondrej Zary
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