Comment 124 for bug 1357093

This bug has just hosed a system I installed for my parents. An unattended-upgrader that breaks your system if you don't attend to it IS broken.

Having known about this problem for many years, the least you could have done is added a warning to the installer that choosing lvm or encryption will make a system that breaks itself.

The idea that novice users can just run script workarounds is entirely unrealistic.
a) They don't know about the problem if they haven't been told (burying it deep in the manuals or text that whizzes by is not good enough)
b) from a security PoV they shouldn't be run anything they cut & paste in

The general attitude to a major showstopper that is causing a lot of pain for novice users shown in this bug is frankly appalling and I'm pretty much inclined to ditch Ubuntu because of it.