[Bug 1942774] Re: No fallback English layout on account creation screen during installation. Ubuntu installer won't accept non-Latin characters

[Omer I.S.]

** Description changed:

- Impish Indri daily
- 
- I cannot reproduce this bug anymore. Layout is hard-set to English,
- which solves this issue but creates another issue discussed in bug
- #1945848. Still, I'll leave the steps required to reproduce below:
+ Update: still reproducible in Resolute Racoon daily. (Edited by someone
+ else)
  
  Steps to reproduce:
- 1) Choose any language with a character set outside of ISO 8859-1. In my case, Russian
- 2) Proceed with installation. Arrive at "Who are you?" screen
- 3) Type in your name in Russian layout
+ 1) Choose any non-Latin keyboard layout (recommended; Russian, Arabic)
+ 2) Proceed with installation. Arrive to the account set-up screen
+ 3) Type in your name in the non-Latin layout
      - The "Your username" field is not filled automatically
  5) Try typing a username you wish to use
-     - It cannot recognize the characters and won't let you continue.
-     - It will thus complain that usernames should begin with lowercase letters
+     - It cannot recognise the characters and won't let you continue.
+     - It will thus complain that usernames should begin with lower-case letters
  
  No matter if the letters are lower or upper case, it simply cannot
  recognize them.
  
- User is forced to manually add English or a similar layout that has
- Latin characters.
+ The user cannot finish installation using the non-Latin layout. The user
+ is forced to manually add English or a similar layout that has Latin
+ characters.
  
- ProblemType: Bug
- DistroRelease: Ubuntu 21.10
- Package: ubiquity 21.10.5
- ProcVersionSignature: Ubuntu 5.13.0-14.14-generic 5.13.1
- Uname: Linux 5.13.0-14-generic x86_64
- NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
- ApportVersion: 2.20.11-0ubuntu68
- Architecture: amd64
- CasperMD5CheckResult: pass
- CasperVersion: 1.465
- CurrentDesktop: ubuntu:GNOME
- Date: Mon Sep  6 17:37:52 2021
- InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
- LiveMediaBuild: Ubuntu 21.10 "Impish Indri" - Alpha amd64 (20210905)
- ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=ru_RU.UTF-8
-  SHELL=/bin/bash
- SourcePackage: ubiquity
- UpgradeStatus: No upgrade log present (probably fresh install)
+ A good solution could be adding a fallback English (US) layout to every
+ non-Latin keyboard layout, or even better, letting the user to choose an
+ additional keyboard layout himself and a keyboard shortcut to switch
+ between the two keyboard layouts.

** Description changed:

  Update: still reproducible in Resolute Racoon daily. (Edited by someone
- else)
+ else than the original bug reporter)
  
  Steps to reproduce:
  1) Choose any non-Latin keyboard layout (recommended; Russian, Arabic)
  2) Proceed with installation. Arrive to the account set-up screen
  3) Type in your name in the non-Latin layout
      - The "Your username" field is not filled automatically
  5) Try typing a username you wish to use
      - It cannot recognise the characters and won't let you continue.
      - It will thus complain that usernames should begin with lower-case letters
  
  No matter if the letters are lower or upper case, it simply cannot
  recognize them.
  
  The user cannot finish installation using the non-Latin layout. The user
  is forced to manually add English or a similar layout that has Latin
  characters.
  
  A good solution could be adding a fallback English (US) layout to every
  non-Latin keyboard layout, or even better, letting the user to choose an
  additional keyboard layout himself and a keyboard shortcut to switch
  between the two keyboard layouts.

** Attachment added: "installer-arabic.png"
   https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1942774/+attachment/5929784/+files/installer-arabic.png

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https://bugs.launchpad.net/bugs/1942774

Title:
  No fallback English layout on account creation screen during
  installation. Ubuntu installer won't accept non-Latin characters

Status in subiquity:
  Triaged
Status in ubuntu-desktop-installer:
  Won't Fix
Status in ubuntu-desktop-provision:
  New
Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  Update: still reproducible in Resolute Racoon daily. (Edited by
  someone else than the original bug reporter)

  Steps to reproduce:
  1) Choose any non-Latin keyboard layout (recommended; Russian, Arabic)
  2) Proceed with installation. Arrive to the account set-up screen
  3) Type in your name in the non-Latin layout
      - The "Your username" field is not filled automatically
  5) Try typing a username you wish to use
      - It cannot recognise the characters and won't let you continue.
      - It will thus complain that usernames should begin with lower-case letters

  No matter if the letters are lower or upper case, it simply cannot
  recognize them.

  The user cannot finish installation using the non-Latin layout. The
  user is forced to manually add English or a similar layout that has
  Latin characters.

  A good solution could be adding a fallback English (US) layout to
  every non-Latin keyboard layout, or even better, letting the user to
  choose an additional keyboard layout himself and a keyboard shortcut
  to switch between the two keyboard layouts.

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