It seems that the problem reported is not a regression in acpi, but a bug in the amd64 version. For all the live systems I tested, each time I used a 386/686 version it worked fine, each time I tried a amd64 version it failed. Hoping this will help narrowing the bug! From now on, I'm not sure about what I could do to understand the problem? Maybe a kernel recompilation with some debugging options added? But which? Salutations, and thanks for your help Matt -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html