Sorry if I filed it under the wrong package. I was following the 
recommendations on this page for hardware problems: 
https://help.ubuntu.com/community/ReportingBugs
which led me to here: 
https://wiki.ubuntu.com/Bugs/FindRightPackage#Hardware_Malfunctions
which says: "If a piece of hardware is malfunctioning, typically the problem 
package is the kernel."

I don't know which package controls xprop or xkb, but this page from 2012, 
which "is potentially out of date as of Intrepid due to input-hotplug": 
https://wiki.ubuntu.com/DebuggingKeyboardDetection
says: "Keyboard related bugs should initially be filed against xorg, as bugbot 
will switch it to the correct package (ex. xserver-xorg-input-evdev). If the 
bug turns out to be a kernel bug or a bug in another package, bug triagers can 
assign the bug additionally to that package and mark the 
xserver-xorg-input-evdev task as invalid."

Would you like me to change it to xorg, or should I let someone more
knowledgeable than me handle it?

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https://bugs.launchpad.net/bugs/1902001

Title:
  USB keyboard layout incorrect after unplugging and replugging

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Description:  Ubuntu 20.04.1 LTS
  Release:      20.04
  Kernel version: 5.4.0-52-generic (but problem began with 5.4.0-51-generic)
  Keyboard:       Bus 001 Device 018: ID 056e:1063 Elecom Co., Ltd ELECOM 
TK-FCP097

  Expected behaviour:
  USB keyboard layout remains the same when unplugging and replugging in same 
keyboard
  (This was the behaviour on 5.4.0-48-generic and earlier.)

  What happened instead:
  USB keyboard layout changes from:
  < _XKB_RULES_NAMES(STRING) = "evdev", "pc105", "us,jp,us,us", ",,intl,", 
"grp_led:scroll"

  to:
  > _XKB_RULES_NAMES(STRING) = "evdev", "pc105", "us,us", ",intl", 
"grp:alt_shift_toggle,grp_led:scroll"
  (output of xprop -root | grep XKB )

  The keyboard layout is reset to the correct layout after logging out
  and back in (or after suspend/resume); however, unplugging and
  replugging the keyboard in causes the same unexpected behaviour.

  Same problem occurs with a different USB keyboard: Bus 001 Device 019:
  ID 0d62:8070 Darfon Electronics Corp. ELECOM Wired Keyboard

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-52-generic 5.4.0-52.57
  ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
  Uname: Linux 5.4.0-52-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.10
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tyler     18578 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Oct 29 16:35:31 2020
  InstallationDate: Installed on 2020-02-05 (266 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  MachineType: Dell Inc. Latitude 5500
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-52-generic 
root=UUID=fa5c4fdb-0e37-4ef5-b109-3c129736f66c ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-52-generic N/A
   linux-backports-modules-5.4.0-52-generic  N/A
   linux-firmware                            1.187.3
  SourcePackage: linux
  UpgradeStatus: Upgraded to focal on 2020-05-12 (170 days ago)
  dmi.bios.date: 07/06/2020
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.9.1
  dmi.board.name: 0M14W7
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.9.1:bd07/06/2020:svnDellInc.:pnLatitude5500:pvr:rvnDellInc.:rn0M14W7:rvrA01:cvnDellInc.:ct10:cvr:
  dmi.product.family: Latitude
  dmi.product.name: Latitude 5500
  dmi.product.sku: 08B9
  dmi.sys.vendor: Dell Inc.

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