Revisiting this, the "Ubuntu" comes from os-prober, or more precisely the file /etc/lsb-release. The DISRIB_ID field should be labelled "Lubuntu" and not "Ubuntu". Grub2 has the same problem as yaboot.
Revisiting this, the "Ubuntu" comes from os-prober, or more precisely the file /etc/lsb-release. The DISRIB_ID field should be labelled "Lubuntu" and not "Ubuntu". Grub2 has the same problem as yaboot.