Re: [REGRESSION] S3 resume on SandyBridge doesn't work with NX protection(5bd5a45)

[H. Peter Anvin]

On 01/19/2011 09:37 AM, Matthias Hopf wrote:
> Git commit 5bd5a45 in Linus' tree "x86: Add NX protection for kernel data"
> apparently breaks resume on SandyBridge machines. This is supposed to be
> fixed with commit 691513f "x86: Resume trampoline must be executable",
> but even git master (v2.6.38-rc1) shows the same symptoms.
> 
> After suspend to S3, the machine doesn't resume upon wakeup, but boots
> normally instead. Reverting git commits 691513f, 84e1c6b, and especially
> 5bd5a45 (trivial except for a single hunk) makes resume work again.
> 
> lspci -vvv output is attached.
> 
> (for internal reference: machine NUE874)
> 

"Sandy Bridge machines" is not likely to be descriptive.  This is much
more likely to be related to a specific motherboard.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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