[Bug 993761] [NEW] Precise Server Installer does not allow to complete the encrypt partitions procedure

[Pedro]

Public bug reported:

I have tried 3 times to isntall Ubuntu Precise using the Server
Installer amd64 and it proved to be impossible to complete the task
about encrypted partitions.

First i need to clarify that i have the dstro Mageia 2 Beta 3 installed
in the disk with /home encrypted.

I burn the iso ubuntu-12.04-alternate-amd64.iso and then start the installer, all goes fine untill i reach the part about partitioning, which i choose manual and select one partition as /boot, and then select 2 partitions (swap and /) to be encrypted, i enter the passphrase for both and all goes well.
Now i select to activate the partitions and the problem starts here because it always first asks to enter the passphrase for the partitions /dev/sda8 that is isntalled in the disk as the Mageia /home encrypted partition and important to refer that Mageia uses cyper aes-xts-benbi which is NOT RECOGNIZED by ubuntu text installer and apepars to be the problem.
But also why is the installer asking the passphrase about an encrypted partition thats not part of the created encrypted partitions in the isntaller?

Anyway when it asks the passphrase for the Mageia /home encryted
partiton (/dev/sda8) i enter the passphrase but continues asking the
passphrase as it was an invalid one, but the issue is that isnt able to
recognize a partition created with the cypher  aes-xts-benbi, and then
stucks there and it never passes to the encrypted partitions that were
created in the installer.

Thus making impossible to continue the instalation with encrypted
partitions.

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/993761

Title:
  Precise Server Installer does not allow to complete the encrypt
  partitions procedure

Status in “debian-installer” package in Ubuntu:
  New

Bug description:
  I have tried 3 times to isntall Ubuntu Precise using the Server
  Installer amd64 and it proved to be impossible to complete the task
  about encrypted partitions.

  First i need to clarify that i have the dstro Mageia 2 Beta 3
  installed in the disk with /home encrypted.

  I burn the iso ubuntu-12.04-alternate-amd64.iso and then start the installer, all goes fine untill i reach the part about partitioning, which i choose manual and select one partition as /boot, and then select 2 partitions (swap and /) to be encrypted, i enter the passphrase for both and all goes well.
  Now i select to activate the partitions and the problem starts here because it always first asks to enter the passphrase for the partitions /dev/sda8 that is isntalled in the disk as the Mageia /home encrypted partition and important to refer that Mageia uses cyper aes-xts-benbi which is NOT RECOGNIZED by ubuntu text installer and apepars to be the problem.
  But also why is the installer asking the passphrase about an encrypted partition thats not part of the created encrypted partitions in the isntaller?

  Anyway when it asks the passphrase for the Mageia /home encryted
  partiton (/dev/sda8) i enter the passphrase but continues asking the
  passphrase as it was an invalid one, but the issue is that isnt able
  to recognize a partition created with the cypher  aes-xts-benbi, and
  then stucks there and it never passes to the encrypted partitions that
  were created in the installer.

  Thus making impossible to continue the instalation with encrypted
  partitions.

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