Quentin,

> What exactly did you change in acpi_ec.c?

I did change nothing ;) I was planning to read the doc before altering 
anything whatsoever!

> I had my take at this too, since I get a fault evaluating _PDC with the
> acpica code we have in tree, but with the new acpica code, while the GPE
> handler does get installed, it's not installed in a correct way, and I
> don't get notifications when I want them, and a few things lead to a
> panic.  I've seen FreeBSD had to change a few things in there, but did
> not look at this closely.

Neither did I. Obvisouly there is an eel under the stone (tu as vu cette 
belle traduction ? Ils ne vont rien comprendre ! :)). I carry on tinkering.

Have fun,
Vincent