I upgraded to 16.04, and now when booting with the default kernel the system freezes at the purple screen with dots after some seconds. I tried recovery mode and it also freezes after doing some work. It only boots when I try the upstart option in the advanced options.
My system is a Dell Inspiron mini 10
The last printed lines are (in recovery mode)
[ OK ] Started Braille Device Support.
Starting Tell Plymouth To Write Out Runtime Data ....
Starting Recovery Mode Menu....
[ OK ] Started Tell Plymouth To Write Out Runtime Data.
Then it freezes.