Ubuntu operates with UEFI on systems that don't use UEFI.
Ubuntu operates with UEFI on systems that don't use UEFI.
It includes UEFI but it's turned off for USB devices, causing boot failure when using UEFI only. The Gallium OS Live tool doesn't start, whereas Ubuntu does in BIOS mode and installs via UEFI. The Ubuntu version starts in BIOS while the other boots in UEFI.