I'm writing this at the point of annoyance. Maybe I'll find a fix in a minute or two. I took an Acer Revo out of service as an HTPC. It was dual boot Win 7 and Ubuntu 12.04 LTS. I applied all Win 7 updates. Fine. Stupid, but fine. I applied all Ubuntu 12.04 updates. Fine. Not even stupid. It offered me Ubuntu 14.04 LTS. I said to go ahead. I almost never do version upgrades, out of fear, but I didn't have much to lose. And everyone always says Ubuntu version upgrades are smooth as silk. Negative observation one: version upgrades take more real time than re-installations. (But they should take less of my attention and care, a win.) Negative observation two: I thought that the slow upgrade process could happen while I was asleep. Yes, but not in one night: there were three steps in the middle that required me to answer a question. It would have been better if the questions had been moved to the beginning or the end. Fedora does that. Negative observation three: It all appeared to work. The updater disappeared from the screen (a little odd). top(1) showed no remnant. So I rebooted. Now I have the prompt: grub rescue> which means I have nothing, not even Win7. I don't think that I can type anything useful into that prompt. Obviously the third is the lulu. The fact that I am using LTS should indicate my risk aversion. I will fix this but I will remember.