[Bug 964957] [NEW] Installer warns "Could not stat device /dev/mapper/hostname-root - No such file or directory", works after retry

[Sgifford]

Public bug reported:

When I try to install Ubuntu Precise Pangolin using LVM for my
filesystems, it gives me this warning:

  Could not stat device /dev/mapper/hostname-root - No such file or
directory.

If I select "Retry", everything works.

It appears that the LVs are created, but their entries in "/dev/mapper"
don't exist yet when the rest of the system tries to use them.

I will attach a short video with some more information, along with the
fix that worked for me.

** Affects: partman-auto-lvm (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/964957

Title:
  Installer warns "Could not stat device /dev/mapper/hostname-root - No
  such file or directory", works after retry

Status in “partman-auto-lvm” package in Ubuntu:
  New

Bug description:
  When I try to install Ubuntu Precise Pangolin using LVM for my
  filesystems, it gives me this warning:

    Could not stat device /dev/mapper/hostname-root - No such file or
  directory.

  If I select "Retry", everything works.

  It appears that the LVs are created, but their entries in
  "/dev/mapper" don't exist yet when the rest of the system tries to use
  them.

  I will attach a short video with some more information, along with the
  fix that worked for me.

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https://bugs.launchpad.net/ubuntu/+source/partman-auto-lvm/+bug/964957/+subscriptions