It does not disable EC, it disables EC GPE (interrupt from EC).
Could you please test patch from comment #81 in bug #9998?
http://bugzilla.kernel.org/attachment.cgi?id=17695&action=view

Thanks,
Alex.
jmerkey@wolfmountaingroup.com wrote:
quoted text
> See an ACPI: EC storm detected message, disabling EC
> 
> On both a compaq presario 2200 laptop and an Acer 9410 laptop.  Looks like
> a brain dead error message not actually reporting any genuine errors.
> 
> Jeff
> 
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