Public bug reported:

System information
====================

    $ lsb_release -rd
    Description:        Ubuntu 18.04.2 LTS
    Release:    18.04

    $ apt-cache policy udev
    udev:
      Installed: 237-3ubuntu10.21
      Candidate: 237-3ubuntu10.21
      Version table:
     *** 237-3ubuntu10.21 500
            500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
            100 /var/lib/dpkg/status
         237-3ubuntu10.19 500
            500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 
Packages
         237-3ubuntu10 500
            500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

 Problem
=========

The `udev` package includes `/lib/modprobe.d/fbdev-blacklist.conf`, a
configuration file blacklisting several kernel modules. It's not listed
as a configuration file in the package, though:

    $ cat /var/lib/dpkg/info/udev.conffiles
    /etc/init.d/udev
    /etc/udev/udev.conf

This means that, if I want to go ahead and use the `sisfb` kernel
module, for example, I unblacklist it in the two files it's blacklisted
in. However, any updated version of `udev` that's installed will throw
away my changes to `/lib/modprobe.d/fbdev-blacklist.conf` by simply
overwriting the file and again blacklist the kernel module, which
doesn't work well when the system is being used by someone very new to
computers.

I can't avoid that by simply telling APT to leave configuration files
alone because the `.conf` file here technically isn't a configuration
file. Also, `chattr +i /lib/modprobe.d/fbdev-blacklist.conf` causes APT
to require someone with technical knowledge to take extra effort to
repair things when the end user agrees to an install in the weekly GUI
reminder of new software.

 Request
=========

Please mark `/lib/modprobe.d/fbdev-blacklist.conf` as a configuration
file in `udev`.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: udev 237-3ubuntu10.21
ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18
Uname: Linux 4.15.0-47-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: XFCE
CustomUdevRuleFiles: 70-snap.core.rules 70-snap.cnctsun.rules 
70-snap.cncra2yr.rules 70-snap.cncra.rules 60-vboxdrv.rules
Date: Sat May  4 21:51:42 2019
InstallationDate: Installed on 2018-12-27 (128 days ago)
InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 020: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. XPS 13 9360
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-47-generic 
root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=1
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/27/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.10.0
dmi.board.name: 0839Y6
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvr2.10.0:bd09/27/2018:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn0839Y6:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 9360
dmi.sys.vendor: Dell Inc.

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


** Tags: amd64 apport-bug bionic

** Description changed:

-  System information
+ System information
  ====================
  
-     $ lsb_release -rd
-     Description:      Ubuntu 18.04.2 LTS
-     Release:  18.04
+     $ lsb_release -rd
+     Description:      Ubuntu 18.04.2 LTS
+     Release:  18.04
  
-     $ apt-cache policy udev
-     udev:
-       Installed: 237-3ubuntu10.21
-       Candidate: 237-3ubuntu10.21
-       Version table:
-      *** 237-3ubuntu10.21 500
-             500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
-             100 /var/lib/dpkg/status
-          237-3ubuntu10.19 500
-             500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 
Packages
-          237-3ubuntu10 500
-             500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
+     $ apt-cache policy udev
+     udev:
+       Installed: 237-3ubuntu10.21
+       Candidate: 237-3ubuntu10.21
+       Version table:
+      *** 237-3ubuntu10.21 500
+             500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
+             100 /var/lib/dpkg/status
+          237-3ubuntu10.19 500
+             500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 
Packages
+          237-3ubuntu10 500
+             500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
  
-  Problem
+  Problem
  =========
  
  The `udev` package includes `/lib/modprobe.d/fbdev-blacklist.conf`, a
  configuration file blacklisting several kernel modules. It's not listed
  as a configuration file in the package, though:
  
-     $ cat /var/lib/dpkg/info/udev.conffiles
-     /etc/init.d/udev
-     /etc/udev/udev.conf
+     $ cat /var/lib/dpkg/info/udev.conffiles
+     /etc/init.d/udev
+     /etc/udev/udev.conf
  
  This means that, if I want to go ahead and use the `sisfb` kernel
  module, for example, any updated version of `udev` that's installed will
  again blacklist the kernel module, which doesn't work well when the
  system is being used by someone very new to computers.
  
  I can't avoid that by simply telling APT to leave configuration files
- alone because a `.conf` file technically isn't a configuration file.
- Also, `chattr +i /lib/modprobe.d/fbdev-blacklist.conf` causes APT to
- take extra effort to repair things when the end user agrees to an
- install in the GUI reminder of new software.
+ alone because the `.conf` file here technically isn't a configuration
+ file. Also, `chattr +i /lib/modprobe.d/fbdev-blacklist.conf` causes APT
+ to require someone with technical knowledge to take extra effort to
+ repair things when the end user agrees to an install in the weekly GUI
+ reminder of new software.
  
-  Request
+  Request
  =========
  
  Please mark `/lib/modprobe.d/fbdev-blacklist.conf` as a configuration
  file in `udev`.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: udev 237-3ubuntu10.21
  ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18
  Uname: Linux 4.15.0-47-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  CurrentDesktop: XFCE
  CustomUdevRuleFiles: 70-snap.core.rules 70-snap.cnctsun.rules 
70-snap.cncra2yr.rules 70-snap.cncra.rules 60-vboxdrv.rules
  Date: Sat May  4 21:51:42 2019
  InstallationDate: Installed on 2018-12-27 (128 days ago)
  InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  Lsusb:
-  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
-  Bus 001 Device 020: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
-  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
+  Bus 001 Device 020: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
+  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 9360
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-47-generic 
root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=1
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/27/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.10.0
  dmi.board.name: 0839Y6
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr2.10.0:bd09/27/2018:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn0839Y6:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 13 9360
  dmi.sys.vendor: Dell Inc.

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https://bugs.launchpad.net/bugs/1827753

Title:
  udev package doesn't mark as a configuration file fbdev-blacklist.conf

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