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

[Clint Byrum]

Hello Sgifford, or anyone else affected,

Accepted partman-auto-lvm into precise-proposed. The package will build
now and be available at http://launchpad.net/ubuntu/+source/partman-
auto-lvm/42ubuntu2.2 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: partman-auto-lvm (Ubuntu Precise)
       Status: Confirmed => Fix Committed

** Tags added: verification-needed

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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:
  Fix Released
Status in “partman-auto-lvm” source package in Precise:
  Fix Committed

Bug description:
  [Impact]
  Installs using LVM can fail due to a race with the message "Could not stat device /dev/mapper/$hostname-root - No such file or directory". This is very reproducible on some systems, but not others (presumably due to timing). I've had good luck reproducing w/ a kvm VM. During manual installs this is a fairly minor error - selecting "Retry" allows the install to continue. However, this is a fatal error on automated installs.
  [Test Case]
  Do an LVM install using d-i - manual or preseeded and look for the above error message.
  [Regression Potential]
  This introduced a new call into the udev stack, so a bug there could trip us up - but, it seems like if any such bug existed, we'd hit it already w/ one of the other settle calls.

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