Boot kubuntu in UEFI mode from the BIOS. You achieve this by pressing F2 when the DELL logo shows up and in Boot Option, select UEFI. Secure mode must be disabled.
My solution is to run boot-repair after the installer crashed.
sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get Media:Example.ogginstall -y boot-repair && boot-repair
Boot-repair comes with problems of its own, along the lines of Please enable a repository containing the [...] packages in the software sources of ... Then try again. Generating the report and looking at the error, it shows where the software is looking for sources.list. It is then just a matter of locating it (locate) and symlink, then run again. Following the steps boot-repairs advises you to take successfully installs the boot-loader.