* Matthew Garrett <mjg@xxxxxxxxxx>: > The ACPI spec tells us that the ACPI SCI_EN bit is under hardware control > and shouldn't be touched by the OS. It seems that the Leading Other OS > ignores this and some machines expect this behaviour. We have a blacklist > for these, but given that we're able to detect the failure case and the > alternative to breaking the spec is letting the machine crash and burn, > let's try falling back when we know the alternative is a mostly-dead > machine. Yes, we got a hint from a Lenovo BIOS developer: A SCI_EN bit had not been set at S3 resume post. It should be set as ACPI defines. It seems that Windows OS sets SCI_EN bit by itself after S3 resume.... So I believe that Matthew's approach is reasonably safe and correct. Acked-by: Alex Chiang <achiang@xxxxxxxxxxxxx> /ac -- 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
