[Bug 1586303] [NEW] After upgrade from Xubuntu 15.10 to 16.04, old kenrels are on /boot but not shown by `dpkg -l`

[Jarno Suni]

Public bug reported:

Illustrated in shell:

$ ls -l /boot/vmlinuz-*
-rw------- 1 root root 6808720 helmi 26 05:17 /boot/vmlinuz-4.2.0-30-generic
-rw------- 1 root root 6808528 maali 11 02:11 /boot/vmlinuz-4.2.0-34-generic
-rw------- 1 root root 6829104 maali 16 02:45 /boot/vmlinuz-4.2.0-35-generic
-rw-r--r-- 1 root root 7013984 huhti 28 16:03 /boot/vmlinuz-4.4.0-21-generic
-rw------- 1 root root 7015440 touko 13 02:55 /boot/vmlinuz-4.4.0-22-generic
$ linux-version list
4.2.0-30-generic
4.2.0-34-generic
4.2.0-35-generic
4.4.0-21-generic
4.4.0-22-generic
$ dpkg -l linux-image-4'*' |grep .
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                         Version      Architecture Description
+++-============================-============-============-======================================================
ii  linux-image-4.4.0-21-generic 4.4.0-21.37  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-22-generic 4.4.0-22.40  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: dpkg 1.18.4ubuntu1.1
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri May 27 11:31:51 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-04-28 (28 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: dpkg
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: dpkg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1586303

Title:
  After upgrade from Xubuntu 15.10 to 16.04, old kenrels are on /boot
  but not shown by `dpkg -l`

Status in dpkg package in Ubuntu:
  New

Bug description:
  Illustrated in shell:

  $ ls -l /boot/vmlinuz-*
  -rw------- 1 root root 6808720 helmi 26 05:17 /boot/vmlinuz-4.2.0-30-generic
  -rw------- 1 root root 6808528 maali 11 02:11 /boot/vmlinuz-4.2.0-34-generic
  -rw------- 1 root root 6829104 maali 16 02:45 /boot/vmlinuz-4.2.0-35-generic
  -rw-r--r-- 1 root root 7013984 huhti 28 16:03 /boot/vmlinuz-4.4.0-21-generic
  -rw------- 1 root root 7015440 touko 13 02:55 /boot/vmlinuz-4.4.0-22-generic
  $ linux-version list
  4.2.0-30-generic
  4.2.0-34-generic
  4.2.0-35-generic
  4.4.0-21-generic
  4.4.0-22-generic
  $ dpkg -l linux-image-4'*' |grep .
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name                         Version      Architecture Description
  +++-============================-============-============-======================================================
  ii  linux-image-4.4.0-21-generic 4.4.0-21.37  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
  ii  linux-image-4.4.0-22-generic 4.4.0-22.40  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: dpkg 1.18.4ubuntu1.1
  ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Fri May 27 11:31:51 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-04-28 (28 days ago)
  InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  SourcePackage: dpkg
  UpgradeStatus: No upgrade log present (probably fresh install)

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