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[Darek <ddarek.ch@xxxxx>]

After multiple update-initramfs and kernel reinstalls instead of message
'fstype not found' I have 'can't open /dev/mapper/ubuntu-root no such
file'. However all the rest of the stacktrace seems to be similar as
already attached photo of the stacktrace. I check if I have installed
lvm2 and it is. Installed 3.16.x kernel (or 3.19.x) and situation didn't
changed.

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https://bugs.launchpad.net/bugs/1581761

Title:
  Kernel panic - not syncing - Attempted to kill init

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Suddenly I can't boot as I receive 'kernel panic - not syncing - Attempted to kill init'. I tried to use previous kernel, then reinstall kernels but all that didn't help me. I have luks encrypted partition which contains multiple lvm with ext4 volumes. This was working since 14.04 was released so this not standard configuration should not cause this issue.
  I am able to run live cd, then decrypt luks partition and mount volumes and chroot. All seems to be ok. I fsck lvm and all is ok.
  I found similar issue https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1273261 which suggest to try udev_settle. This didn't helped. I even entered sleep 5 (thus "sleeping for 5 secs" message on the stacktrace in the middle) but this didn't solve the issue. Maybe I enter this hack too early in the script?

  No more idea... so mayday, mayday...
  I attached photo of the stacktrace and report of 'apport-cli linux-generic'.

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