Public bug reported:
During distribution upgrade (24 to 26) using the popup window, the tool asked
me to report the following bug:
old postfix package postinst maintainer script subprocess failed with exit
status 1
The upgrade went to the end, with a first alert popup reminding this
problem and saying the upgrade was impossible. Another alert popup was
behind, saying the upgrade was successfully installed. I saved this
message and rebooted.
Now (after some updates), apt upgrade show this error (with some french):
Sommaire :
Mise à niveau de : 0. Installation de : 0, Supprimé : 0. Non mis à jour : 0
1 partiellement installés ou enlevés.
Espace nécessaire : 0 o / 186 Go disponible
[…]
Paramétrage de postfix (3.10.6-4ubuntu2.1) ...
postconf: fatal: open /etc/postfix/main.cf: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or
directory
dpkg: erreur de traitement du paquet postfix (--configure) :
old postfix package postinst maintainer script subprocess failed with exit
status 1
Des erreurs ont été rencontrées pendant l'exécution :
postfix
Erreur : Sub-process /usr/bin/dpkg returned an error code (1)
I ended removing postfix package, without trouble, and reinstalled it.
At the end of `apt install postfix`, the configuration have the same
issue. And apt upgrade shows the exact same output.
EDIT: After a purge and install I configured the postfix package and
have no more issue.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-38-generic 7.0.0-38.38
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: pvv 5028 F.... wireplumber
/dev/snd/seq: pvv 5012 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 5 20:14:10 2026
InstallationDate: Installed on 2022-06-07 (1581 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
MachineType: Dell Inc. Precision 3571
ProcEnviron:
LANG=fr_FR.UTF8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-38-generic
root=/dev/mapper/vgubuntu-root ro quiet splash
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-10-05 (0 days ago)
dmi.bios.date: 06/26/2026
dmi.bios.release: 1.37
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.37.0
dmi.board.name: 07K1M2
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.ec.firmware.release: 1.20
dmi.modalias:
dmi:bvnDellInc.:bvr1.37.0:bd06/26/2026:br1.37:efr1.20:svnDellInc.:pnPrecision3571:pvr:rvnDellInc.:rn07K1M2:rvrA00:cvnDellInc.:ct10:cvr:sku0B10:pfaPrecision:
dmi.product.family: Precision
dmi.product.name: Precision 3571
dmi.product.sku: 0B10
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Description changed:
During distribution upgrade (24 to 26) using the popup window, the tool asked
me to report the following bug:
old postfix package postinst maintainer script subprocess failed with exit
status 1
The upgrade went to the end, with a first alert popup reminding this
problem and saying the upgrade was impossible. Another alert popup was
behind, saying the upgrade was successfully installed. I saved this
message and rebooted.
Now (after some updates), apt upgrade show this error (with some french):
- Sommaire :
- Mise à niveau de : 0. Installation de : 0, Supprimé : 0. Non mis à jour : 0
- 1 partiellement installés ou enlevés.
- Espace nécessaire : 0 o / 186 Go disponible
+ Sommaire :
+ Mise à niveau de : 0. Installation de : 0, Supprimé : 0. Non mis à jour : 0
+ 1 partiellement installés ou enlevés.
+ Espace nécessaire : 0 o / 186 Go disponible
[…]
Paramétrage de postfix (3.10.6-4ubuntu2.1) ...
postconf: fatal: open /etc/postfix/main.cf: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or
directory
dpkg: erreur de traitement du paquet postfix (--configure) :
- old postfix package postinst maintainer script subprocess failed with exit
status 1
+ old postfix package postinst maintainer script subprocess failed with exit
status 1
Des erreurs ont été rencontrées pendant l'exécution :
- postfix
+ postfix
Erreur : Sub-process /usr/bin/dpkg returned an error code (1)
I ended removing postfix package, without trouble, and reinstalled it.
- At the end of apt install postfix, the configuration have the same
+ At the end of `apt install postfix`, the configuration have the same
issue. And apt upgrade shows the exact same output.
+
+ EDIT: After a purge and install I configured the postfix package and
+ have no more issue.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-38-generic 7.0.0-38.38
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: pvv 5028 F.... wireplumber
- /dev/snd/seq: pvv 5012 F.... pipewire
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: pvv 5028 F.... wireplumber
+ /dev/snd/seq: pvv 5012 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 5 20:14:10 2026
InstallationDate: Installed on 2022-06-07 (1581 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64
(20220419)
MachineType: Dell Inc. Precision 3571
ProcEnviron:
- LANG=fr_FR.UTF8
- PATH=(custom, no user)
- SHELL=/bin/bash
- TERM=xterm-256color
- XDG_RUNTIME_DIR=<set>
+ LANG=fr_FR.UTF8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-256color
+ XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-38-generic
root=/dev/mapper/vgubuntu-root ro quiet splash
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-10-05 (0 days ago)
dmi.bios.date: 06/26/2026
dmi.bios.release: 1.37
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.37.0
dmi.board.name: 07K1M2
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.ec.firmware.release: 1.20
dmi.modalias:
dmi:bvnDellInc.:bvr1.37.0:bd06/26/2026:br1.37:efr1.20:svnDellInc.:pnPrecision3571:pvr:rvnDellInc.:rn07K1M2:rvrA00:cvnDellInc.:ct10:cvr:sku0B10:pfaPrecision:
dmi.product.family: Precision
dmi.product.name: Precision 3571
dmi.product.sku: 0B10
dmi.sys.vendor: Dell Inc.
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https://bugs.launchpad.net/bugs/2169627
Title:
postfix issue
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