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

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Message-ID: <508A122F.3090304@gmail.com>
Date:	Thu, 25 Oct 2012 22:31:43 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Ondrej Zary <linux@...nbow-software.org>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Enable A20 using KBC for some MSI laptops to fix S3 resume

On 10/24/2012 02:09 PM, Alan Cox wrote:
> On Wed, 24 Oct 2012 12:36:04 -0700
> "H. Peter Anvin" <hpa@...or.com> wrote:
>
>> Minor concern: it should do the wait for ready before sending each command.
>
> Can we get a command line to do this quirk too - it strikes me that if
> the MSIs rely upon it then it may be something Windows always does so
> will be useful to try on other problem machines as an experiment.

I agree, one has to keep in mind the age-old question "how does Windows 
work?" since it surely has no such quirk. I'd say we're sometimes too 
quick to add these DMI quirks when a more general solution would be 
somehow figure out how the Linux behavior differs from what Windows is 
doing.

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