I too ran in to a problem after upgrading a luks full disk encrypted 12.04.5 system to 14.04.1. After successfully upgrading, upon reboot I was asked for the luks password for the root system. After entering the password, I see sever errors including "/sbin/cryptsetup not found".
I too ran in to a problem after upgrading a luks full disk encrypted 12.04.5 system to 14.04.1. After successfully upgrading, upon reboot I was asked for the luks password for the root system. After entering the password, I see sever errors including "/sbin/cryptsetup not found".
After doing research I came across bug https:/ /bugs.launchpad .net/ubuntu/ +source/ cryptsetup/ +bug/1256730. After booting from a rescue cd, creating the file in comment #4 and updating the initrd, the cryptsetup could be found in the initrd.
Another reboot and all was good.