[Bug 932663] Re: kernel upgrade failed on a USB live system created by usb-creator

[Mmortal03]

It doesn't seem like this was fixed, or maybe it has regressed, but I'm
having the same issue with 14.10, when a security update takes the
kernel from 3.16.0-23.24 to 3.16.0-31.43.

I happened to use Universal-USB-Installer to create my persistent live
USB copy of Lubuntu, then I used gparted to make a larger casper-rw ext2
partition than the 4GB FAT32 file limit, but that probably doesn't
matter.

I get the cryptsetup warnings like everyone else, but that's only a
canary in a coalmine, as you can simply remove cryptsetup, and the OS
*still* won't boot after installing the updates that cause this.

I also tried Colin Watson's workaround before running the update, and
this did *not* help.

So, to reproduce the bug, all I have to do in Software Updater is put a
check, under security updates, next to "Generic Linux Kernel Image" and
then run the update -- also, any other update that *depends* on the
kernel image being updated also causes the issue.

On restart, I get ""(initramfs) Unable to find a medium containing a
live file system", and it won't boot into Lubuntu.

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https://bugs.launchpad.net/bugs/932663

Title:
  kernel upgrade failed on a USB live system created by usb-creator

Status in casper package in Ubuntu:
  Fix Released
Status in casper source package in Precise:
  Confirmed

Bug description:
  ubuntu at ubuntu:~/Downloads$ ls -l
  total 37512
  -rw-rw-r-- 1 ubuntu ubuntu 38365944 Feb 15 10:46 linux-image-3.2.0-16-generic_3.2.0-16.25_amd64.deb
  ubuntu at ubuntu:~/Downloads$ sudo dpkg --install linux-image-3.2.0-16-generic_3.2.0-16.25_amd64.deb 
  Selecting previously unselected package linux-image-3.2.0-16-generic.
  (Reading database ... 131642 files and directories currently installed.)
  Unpacking linux-image-3.2.0-16-generic (from linux-image-3.2.0-16-generic_3.2.0-16.25_amd64.deb) ...
  Done.
  Setting up linux-image-3.2.0-16-generic (3.2.0-16.25) ...
  Running depmod.
  update-initramfs: deferring update (hook will be called later)
  The link /vmlinuz is a dangling linkto /boot/vmlinuz-3.2.0-12-generic
  Examining /etc/kernel/postinst.d.
  run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.2.0-16-generic /boot/vmlinuz-3.2.0-16-generic
  update-initramfs: Generating /boot/initrd.img-3.2.0-16-generic
  cryptsetup: WARNING: failed to detect canonical device of overlayfs
  cryptsetup: WARNING: could not determine root device from /etc/fstab
  run-parts: executing /etc/kernel/postinst.d/pm-utils 3.2.0-16-generic /boot/vmlinuz-3.2.0-16-generic
  run-parts: executing /etc/kernel/postinst.d/update-notifier 3.2.0-16-generic /boot/vmlinuz-3.2.0-16-generic
  run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.2.0-16-generic /boot/vmlinuz-3.2.0-16-generic
  /usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?).
  run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
  Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-3.2.0-16-generic.postinst line 1010.
  dpkg: error processing linux-image-3.2.0-16-generic (--install):
   subprocess installed post-installation script returned error exit status 2
  Errors were encountered while processing:
   linux-image-3.2.0-16-generic
  ubuntu at ubuntu:~/Downloads$

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: casper 1.303
  ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2
  Uname: Linux 3.2.0-12-generic x86_64
  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
  CasperVersion: 1.303
  Date: Wed Feb 15 11:04:48 2012
  LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120201.1)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: casper
  UpgradeStatus: No upgrade log present (probably fresh install)

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