I got tired of typing my name in mdm - so I installed lightdm, no apparent problems. It asked which one I wanted to use as a default. I think, Ok, looking good, right! (right?) I said lightdm.
Now, I boot, and i get errors, and mint won't boot. Won't boot in recovery, either. Startup says mdm is not default, and it is shutting it down, something about a pipe and can't write, and stopping systemV compatability. Same thing each time, but I had to boot into windows to write this. I can't boot mint no way. Not regular, not recovery. Same messages both ways.
What do I do now? I don't particularly want to reinstall from scratch - lot of work, that.