package grub-pc 2.02-2ubuntu8.2 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 10

[Tarciso Junior]

This error come up every time I start my system.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-pc 2.02-2ubuntu8.2
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Tue Jul 24 20:46:47 2018
DuplicateSignature:
 package:grub-pc:2.02-2ubuntu8.2
 Setting up unattended-upgrades (1.1ubuntu1.18.04.5) ...
 dpkg: error processing package unattended-upgrades (--configure):
  installed unattended-upgrades package post-installation script subprocess returned error exit status 10
ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 10
InstallationDate: Installed on 2018-03-14 (132 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-29-generic root=UUID=2d103f0a-4c1b-4b58-9ce0-f4b78f65a235 ro quiet splash
Python3Details: /usr/bin/python3.6, Python 3.6.5, unpackaged
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, unpackaged
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3
SourcePackage: grub2
Title: package grub-pc 2.02-2ubuntu8.2 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 10
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Phillip Susi (psusi)]

Please open a terminal and do the following:

sudo nano /var/lib/dpkg/info/grub-pc.postinst

In the editor, change the first line from "set -e" to "set -ex", then save and exit. Then run sudo apt-get install -f and post the output.

[Nikolay Savelev (nik-weter)]

Настраивается пакет grub-pc (2.02-2ubuntu8.2) …
+ cached_available_ids=
+ case "$1" in
+ . /usr/share/debconf/confmodule
++ '[' '!' '' ']'
++ PERL_DL_NONLAZY=1
++ export PERL_DL_NONLAZY
++ '[' '' ']'
++ exec /usr/share/debconf/frontend /var/lib/dpkg/info/grub-pc.postinst configure 2.02-2ubuntu8
+ cached_available_ids=
+ case "$1" in
+ . /usr/share/debconf/confmodule
++ '[' '!' 1 ']'
++ '[' -z '' ']'
++ exec
++ '[' '' ']'
++ exec
++ DEBCONF_REDIR=1
++ export DEBCONF_REDIR
+ devicemap_regenerated=
+ egrep -q '^[[:space:]]*post(inst|rm)_hook[[:space:]]*=[[:space:]]*(/sbin/|/usr/sbin/)?update-grub' /etc/kernel-img.conf
+ case grub-pc in
+ mkdir -p /boot/grub
+ test -e /boot/grub/device.map
+ test -z ''
+ test -s /boot/grub/device.map
+ test -z ''
+ dpkg --compare-versions 2.02-2ubuntu8 lt-nl 1.99~20101210-2
++ mktemp -t grub.XXXXXXXXXX
+ tmp_default_grub=/tmp/grub.Q94e5IZZXU
+ trap 'rm -f /tmp/grub.Q94e5IZZXU' EXIT
+ cp -p /usr/share/grub/default/grub /tmp/grub.Q94e5IZZXU
+ merge_debconf_into_conf /tmp/grub.Q94e5IZZXU GRUB_CMDLINE_LINUX grub2/linux_cmdline
+ local tmpfile
+ tmpfile=/tmp/grub.Q94e5IZZXU
+ local setting
+ setting=GRUB_CMDLINE_LINUX
+ local template
+ template=grub2/linux_cmdline
+ db_get grub2/linux_cmdline
+ _db_cmd 'GET grub2/linux_cmdline'
+ _db_internal_IFS='
'
+ IFS=' '
+ printf '%s\n' 'GET grub2/linux_cmdline'
+ IFS='
'
+ IFS='
'
+ read -r _db_internal_line
+ RET=
+ case ${_db_internal_line%%[ ]*} in
+ return 0
+ local value
++ echo ''
++ sed -e 's,[$`"\],\\&,g'
+ value=
+ grep -q '^GRUB_CMDLINE_LINUX=' /tmp/grub.Q94e5IZZXU
++ echo ''
++ sed -e 's,[\@],\\&,g'
+ value=
+ sed -i -re 's@^(GRUB_CMDLINE_LINUX=).*@\1""@' /tmp/grub.Q94e5IZZXU
+ merge_debconf_into_conf /tmp/grub.Q94e5IZZXU GRUB_CMDLINE_LINUX_DEFAULT grub2/linux_cmdline_default
+ local tmpfile
+ tmpfile=/tmp/grub.Q94e5IZZXU
+ local setting
+ setting=GRUB_CMDLINE_LINUX_DEFAULT
+ local template
+ template=grub2/linux_cmdline_default
+ db_get grub2/linux_cmdline_default
+ _db_cmd 'GET grub2/linux_cmdline_default'
+ _db_internal_IFS='
'
+ IFS=' '
+ printf '%s\n' 'GET grub2/linux_cmdline_default'
+ IFS='
'
+ IFS='
'
+ read -r _db_internal_line
+ RET='quiet splash'
+ case ${_db_internal_line%%[ ]*} in
+ return 0
+ local value
++ echo 'quiet splash'
++ sed -e 's,[$`"\],\\&,g'
+ value='quiet splash'
+ grep -q '^GRUB_CMDLINE_LINUX_DEFAULT=' /tmp/grub.Q94e5IZZXU
++ echo 'quiet splash'
++ sed -e 's,[\@],\\&,g'
+ value='quiet splash'
+ sed -i -re 's@^(GRUB_CMDLINE_LINUX_DEFAULT=).*@\1"quiet splash"@' /tmp/grub.Q94e5IZZXU
+ case grub-pc in
+ merge_debconf_into_conf /tmp/grub.Q94e5IZZXU GRUB_TIMEOUT grub-pc/timeout
+ local tmpfile
+ tmpfile=/tmp/grub.Q94e5IZZXU
+ local setting
+ setting=GRUB_TIMEOUT
+ local template
+ template=grub-pc/timeout
+ db_get grub-pc/timeout
+ _db_cmd 'GET grub-pc/timeout'
+ _db_internal_IFS='
'
+ IFS=' '
+ printf '%s\n' 'GET grub-pc/timeout'
+ IFS='
'
+ IFS='
'
+ read -r _db_internal_line
+ RET=10
+ case ${_db_internal_line%%[ ]*} in
+ return 0
+ local value
++ sed -e 's,[$`"\],\\&,g'
++ echo 10
+ value=10
+ grep -q '^GRUB_TIMEOUT=' /tmp/grub.Q94e5IZZXU
++ echo 10
++ sed -e 's,[\@],\\&,g'
+ value=10
+ sed -i -re 's@^(GRUB_TIMEOUT=).*@\1"10"...

[Phillip Susi (psusi)]

Thanks Nikolay. Are you sure that grep -v line was the very last line? I don't see how the script can possibly error out at that point.

[nurbawono (auliajati)]

it's also buggy in Ubuntu Ubuntu 16.04.5 LTS. I solve with remove or modifying name of grub-pc.postinst to grub-pc.postinst.buggy. But sometimes if you update your ubuntu, the grub-pc.postinst is back to /var/lib/dpkg/info, and you're getting same error.

[Jürgen (jurgen-depicker)]

Same state as @nik-weter above.