How did you draw the conclusion that this system hang was caused by deinstalling the apparmor package?
After the Grub chooser, on default boot mode, I got a black text screen, then one line, saying that /dev/sdb1 was clean, then nothing more happened. In recovery mode, I got more than one screen full of messages. The last line was vaguley security related, but did not indicate any failure. A few lines above, the was a Debian related line that contained "+APPARMOR", among many other flags. This recalled me that I had deinstalled apparmor. So I mounted my root file system from a rescue disk, installed apparmor, rebooted, and everything was back to normal.
smime.p7s
Description: S/MIME Cryptographic Signature
