kbd_mode resets on console-setup-linux package upgrade

[a1291762]

Description: Ubuntu 18.04.1 LTS
Release: 18.04

As per this page:
https://askubuntu.com/questions/886593/alt-f4-switches-to-tty4

I had to run this command to fix things (and stop unintentionally switching to other VTs):
sudo kbd_mode -s

I had literally just run some updates so I checked and saw that console-setup-linux was updated. I have a suspicion that something in it's post-install is the cause here?

Since there doesn't appear to be anything else useful to add, here's the dpkg.log section from when the update ran:
2018-08-20 15:20:36 startup archives unpack
2018-08-20 15:20:36 upgrade console-setup-linux:all 1.178ubuntu2.3 1.178ubuntu2.6
2018-08-20 15:20:36 status half-configured console-setup-linux:all 1.178ubuntu2.3
2018-08-20 15:20:36 status unpacked console-setup-linux:all 1.178ubuntu2.3
2018-08-20 15:20:36 status half-installed console-setup-linux:all 1.178ubuntu2.3
2018-08-20 15:20:36 status triggers-pending systemd:amd64 237-3ubuntu10.3
2018-08-20 15:20:36 status triggers-pending ureadahead:amd64 0.100.0-20
2018-08-20 15:20:36 status half-installed console-setup-linux:all 1.178ubuntu2.3
2018-08-20 15:20:43 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:43 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:43 upgrade console-setup:all 1.178ubuntu2.3 1.178ubuntu2.6
2018-08-20 15:20:43 status half-configured console-setup:all 1.178ubuntu2.3
2018-08-20 15:20:43 status unpacked console-setup:all 1.178ubuntu2.3
2018-08-20 15:20:43 status half-installed console-setup:all 1.178ubuntu2.3
2018-08-20 15:20:43 status triggers-pending man-db:amd64 2.8.3-2
2018-08-20 15:20:43 status half-installed console-setup:all 1.178ubuntu2.3
2018-08-20 15:20:43 status unpacked console-setup:all 1.178ubuntu2.6
2018-08-20 15:20:43 status unpacked console-setup:all 1.178ubuntu2.6
2018-08-20 15:20:43 upgrade keyboard-configuration:all 1.178ubuntu2.3 1.178ubuntu2.6
2018-08-20 15:20:43 status half-configured keyboard-configuration:all 1.178ubuntu2.3
2018-08-20 15:20:43 status unpacked keyboard-configuration:all 1.178ubuntu2.3
2018-08-20 15:20:43 status half-installed keyboard-configuration:all 1.178ubuntu2.3
2018-08-20 15:20:43 status half-installed keyboard-configuration:all 1.178ubuntu2.3
2018-08-20 15:20:43 status unpacked keyboard-configuration:all 1.178ubuntu2.6
2018-08-20 15:20:43 status unpacked keyboard-configuration:all 1.178ubuntu2.6
2018-08-20 15:20:43 startup packages configure
2018-08-20 15:20:43 configure keyboard-configuration:all 1.178ubuntu2.6 <none>
2018-08-20 15:20:43 status unpacked keyboard-configuration:all 1.178ubuntu2.6
2018-08-20 15:20:43 status half-configured keyboard-configuration:all 1.178ubuntu2.6
2018-08-20 15:20:45 status installed keyboard-configuration:all 1.178ubuntu2.6
2018-08-20 15:20:45 status triggers-pending initramfs-tools:all 0.130ubuntu3.1
2018-08-20 15:20:45 trigproc ureadahead:amd64 0.100.0-20 <none>
2018-08-20 15:20:45 status half-configured ureadahead:amd64 0.100.0-20
2018-08-20 15:20:45 status installed ureadahead:amd64 0.100.0-20
2018-08-20 15:20:45 trigproc systemd:amd64 237-3ubuntu10.3 <none>
2018-08-20 15:20:45 status half-configured systemd:amd64 237-3ubuntu10.3
2018-08-20 15:20:46 status installed systemd:amd64 237-3ubuntu10.3
2018-08-20 15:20:46 trigproc man-db:amd64 2.8.3-2 <none>
2018-08-20 15:20:46 status half-configured man-db:amd64 2.8.3-2
2018-08-20 15:20:47 status installed man-db:amd64 2.8.3-2
2018-08-20 15:20:47 configure console-setup-linux:all 1.178ubuntu2.6 <none>
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status unpacked console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:47 status half-configured console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:50 status installed console-setup-linux:all 1.178ubuntu2.6
2018-08-20 15:20:50 configure console-setup:all 1.178ubuntu2.6 <none>
2018-08-20 15:20:50 status unpacked console-setup:all 1.178ubuntu2.6
2018-08-20 15:20:50 status half-configured console-setup:all 1.178ubuntu2.6
2018-08-20 15:20:51 status installed console-setup:all 1.178ubuntu2.6
2018-08-20 15:20:51 trigproc initramfs-tools:all 0.130ubuntu3.1 <none>
2018-08-20 15:20:51 status half-configured initramfs-tools:all 0.130ubuntu3.1
2018-08-20 15:21:04 status installed initramfs-tools:all 0.130ubuntu3.1

This is possibly relevant (from my journal):
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (**) Option "fd" "46"
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) event3 - Microsoft Natural Keyboard Pro: device removed
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (**) Option "fd" "47"
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (**) Option "fd" "49"
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) event13 - Eee PC WMI hotkeys: device removed
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (**) Option "fd" "47"
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) event4 - Microsoft Natural Keyboard Pro: device removed
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (**) Option "fd" "91"
...
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:65
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:76
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:66
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:64
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:68
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:83
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:69
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:70
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:77
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:82
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:84
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2845]: (II) systemd-logind: got pause for 13:67
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) systemd-logind: got resume for 13:77
...
Aug 20 15:21:06 imrlincoln acpid[1319]: client 2847[0:0] has disconnected
Aug 20 15:21:06 imrlincoln acpid[1319]: client connected from 2027[0:0]
Aug 20 15:21:06 imrlincoln acpid[1319]: 1 client rule loaded
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event13 - Eee PC WMI hotkeys: is tagged by udev as: Keyboard
Aug 20 15:21:06 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event13 - Eee PC WMI hotkeys: device is a keyboard
...
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) systemd-logind: got resume for 13:67
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event3 - Microsoft Natural Keyboard Pro: is tagged by udev as: Keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event3 - Microsoft Natural Keyboard Pro: device is a keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) systemd-logind: got resume for 13:68
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event4 - Microsoft Natural Keyboard Pro: is tagged by udev as: Keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event4 - Microsoft Natural Keyboard Pro: device is a keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) systemd-logind: got resume for 13:66
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event2 - Power Button: is tagged by udev as: Keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event2 - Power Button: device is a keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) systemd-logind: got resume for 13:65
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event1 - Power Button: is tagged by udev as: Keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event1 - Power Button: device is a keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) systemd-logind: got resume for 13:64
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event0 - Sleep Button: is tagged by udev as: Keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event0 - Sleep Button: device is a keyboard

Looks to me like X was told to re-evaluate all its inputs. Strangely, it seemed to treat everything as a keyboard (including a connected VIVE and USB Audio device):
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) Using input driver 'libinput' for 'C-Media Electronics Inc. USB Audio Device'
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) systemd-logind: got fd for /dev/input/event18 13:82 fd 57 paused 0
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (**) C-Media Electronics Inc. USB Audio Device: always reports core events
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (**) Option "Device" "/dev/input/event18"
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (**) Option "_source" "server/udev"
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event18 - C-Media Electronics Inc. USB Audio Device: is tagged by udev as: Keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event18 - C-Media Electronics Inc. USB Audio Device: device is a keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event18 - C-Media Electronics Inc. USB Audio Device: device removed
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb1/1-6/1-6.1/1-6.1.1/1-6.1.1.4/1-6.1.1.4:1.3/0003:0D8C:0012.0024/input/input31/event18"
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) XINPUT: Adding extended input device "C-Media Electronics Inc. USB Audio Device" (type: KEYBOARD, id 10)
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (**) Option "xkb_model" "pc105"
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (**) Option "xkb_layout" "us"
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (WW) Option "xkb_variant" requires a string value
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (WW) Option "xkb_options" requires a string value
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event18 - C-Media Electronics Inc. USB Audio Device: is tagged by udev as: Keyboard
Aug 20 15:21:07 imrlincoln /usr/lib/gdm3/gdm-x-session[2002]: (II) event18 - C-Media Electronics Inc. USB Audio Device: device is a keyboard

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: console-setup-linux 1.178ubuntu2.6
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 20 15:28:44 2018
InstallationDate: Installed on 2018-05-08 (103 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
 LC_COLLATE=POSIX
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: console-setup
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Tuukka Hastrup (tuukkah2)]

Same just happened to me on Ubuntu 18.10 after console-setup-linux was updated.