Messages in this thread | | | Date | Tue, 11 Dec 2012 12:56:20 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v3] Enable A20 using KBC for some MSI laptops to fix S3 resume |
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On 12/11/2012 12:50 PM, Ondrej Zary wrote: > On Tuesday 11 December 2012 21:36:46 H. Peter Anvin wrote: >> On 12/11/2012 12:29 PM, Ondrej Zary wrote: >>> Something like this? (It works.) >> >> Something like that. We need to make sure we send the proper sequence, >> though, or it might break some SMM firmware... > > Could you please create proper patch? You're the x86 expert (and I'm not). > > I've read that 0xd1 command with 0xdf data is often used to enable A20. But I > don't know when this must be done or what else needs to be done for the SMM > to not break. >
You need to send an FF dummy command afterwards, that's all.
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
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