Comment 12 for bug 58386

The problem here is that the message is not clear enough. It looks like an error message, but it is not. In fact, nearly every Ubuntu system logs this message on every boot.

It simply means that there is no DSDT override included in the initramfs, and it should say that instead. This should be a one-line patch. I suggest:

ACPI: Checking for DSDT override... (none found)