Google search suggests that it's predominantly users with Asus motherboards/systems who see this message. (But not all Asus motherboards/systems are problematic.) I'm seeing this error with an older Asus A7A266 running Intrepid (2.6.27-9).
-- getting "ACPI Invalid PBLK Length 5" - message on Hardy Alpha 5 https://bugs.launchpad.net/bugs/197267 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs