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

[H. Peter Anvin]

My guess is that Windows explicitly enables A20 on resume.  We should do that too, really... with the current heavily unified realmode code it should be easy - let me hack up a patch in the morning.

Robert Hancock <hancockrwd@xxxxxxxxx> wrote:

>On 10/24/2012 02:09 PM, Alan Cox wrote:
>> On Wed, 24 Oct 2012 12:36:04 -0700
>> "H. Peter Anvin" <hpa@xxxxxxxxx> 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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