Background
My Ubuntu 20.04 on a ThinkEdge SE50 boots into CLI instead of GUI after running updates and removing Python 3.8 (the system Python is 3.10). Now I don't know if either of these two or something else I did is the cause for this problem and I don't even care to find out anymore. I'd rather just do a fresh install because the system is already a mess and I'm busy developing an automated process for setting up the software that I need on that kind of machine anyways.
Due to an obscure hardware/driver compatibility issue, I can't use the HWE stack and need to be on GA with the 5.4 kernel. To be specific, the GA version is required by a proprietary CAN-bus interface (from SUNIX) on that machine.
I remember the last time I installed Ubuntu 20.04 Desktop on that machine from an image, it was a lot of work to revert to the 5.4 kernel and deactivate the HWE updates. Hence, I'm looking for an image that I can use to install Ubuntu Desktop 20.04 GA out of the box. I couldn't find such an image.
Question
I'm just looking for a simple way to install Ubuntu Desktop 20.04 GA. The fewer steps, the better.