Public bug reported:

I have my main partition encrypted. When I start my computer, Ubuntu
will prompt me to enter my disk encryption password. This works fine on
the kernel 3.19.0-28-generic, but if I use any of the newer kernels,
like 29, 30, 31 and 32, the system appears to freeze as soon as it gets
to the prompt screen.

I can't actually tell whats going on when its frozen. The only symptom is that 
it does not accept keyboard input anymore, so I can't actually enter my 
encryption password. Nothing happens when I press the keys. It might have been 
that
1) the whole computer had a kernel panic, 
2) it might be frozen in some other way,
3) or it may be just that something went wrong when setting up my keyboard to 
accept input and that the computer is otherwise running fine.

I don't really know, all I can really tell is that if I go back to an
older kernel, like 28, it works absolutely fine, but anything newer and
I can't boot my computer at all.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "version.log"
   
https://bugs.launchpad.net/bugs/1514078/+attachment/4514766/+files/version.log

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https://bugs.launchpad.net/bugs/1514078

Title:
  Ubuntu freezes on boot when asking for encryption password on kernels
  newer then 3.19.0-28-generic

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