[Bug 1573982] Re: LVM boot problem - volumes not activated after upgrade to Xenial

[Steve Dodd]

Confused to see no movement on this bug?

The logical thing seemed to be add another case to /usr/share/initramfs-
tools/scripts/local-top/lvm2 calling lvchange_activate with no
parameters, but it seems that doesn't work - does
activation/auto_activation_volume_list need to be set in lvm.conf
perhaps?

I decided giving an explicit root=/dev/vg/lv on the command line was
probably more transparent than burying a setting in lvm.conf anyway.

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Title:
  LVM boot problem - volumes not activated after upgrade to Xenial

Status in curtin:
  Incomplete
Status in MAAS:
  Incomplete
Status in lvm2 package in Ubuntu:
  Confirmed

Bug description:
  Soon after upgrade to Xenial (from 15.10) the boot process got broken.
  I'm using LVM for /root swap and other partitions.

  ===
  The current behaviour is:

  When I boot short after the Grub login screen I'm getting log messages
  like:

  ---
  Scanning for Btrfs filesystems
  resume: Could not state the resume device file: '/dev/mapper/VolGroup....'
  Please type in the full path...
  ---

  Then I press ENTER, for a few minutes some errors about floppy device
  access are raised (for some reason it tries to scan fd0 when floppy
  drive is empty). And then:

  ---
  Gave up waiting for root device. Common problems: ...
  ...
  ALERT! UUID=xxx-xxx.... does not exist.
  Dropping to a shell.
  ---

  From the BusyBox shell I managed to recover the boot by issuing "lvm
  vgchange -ay", then exit and then boot continues fine (all LVM file
  systems are successfully mounted).

  ===
  One workaround so far is creating /etc/initramfs-tools/scripts/local-top/lvm2-manual script doing "lvm vgchange -ay". But I'm looking for cleaner solution.

  Boot used to work fine with 15.10. Actually the first boot after
  upgrading to Xenial actually worked OK too, I'm not sure what might
  changed meanwhile (I've been fixing some packages installation since
  mysql server upgrade has failed).

  ===
  # lsb_release -rd
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

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