[Bug 2018943] Re: non latin keyboard doesn't suffice for installation

[sudodus]

I tested with a cloned copy of the Ubuntu 23.04 Desktop iso file in a
Dell Precision M4800. I used the new installer once before with the
standard latin keyboard and it worked. Now I tried with Greek and I
failed in the same way as described above.

The problem is that I could not find any convenient way to switch
keyboard temporarily for example to Swedish when the computer name and
user name should be entered.

Finally I fixed it by preparing a terminal window with the two command
lines

setxkbmap se
setxkbmap gr

and fetched them via up-arrow in the terminal window to switch keyboard.
But we should not expect an average user to do that, and a beginner will
definitely get lost.

Alt 1: The latin keyboard should be set automatically in the input
fields where it must be used (and probably English (US) which is
standard).

- computer name
- user name
- password

Please notice that I tested with Greek letters in the password, but it
did not work (I could create an installed system, but could not log in
into it).

I started again, and entered Latin characters also into the password,
and now it works to log into the installed system (even with the same
password as the user name 'asdf'). In the installed system in the login
screen and in the desktop I can switch between US English and Greek
keyboard. So the password should also be locked to Latin characters,
maybe all these critical input fields should be limited to ascii 33-126.

See the attached file (from the first attempt).

Alt 2: If possible Ubuntu should tolerate non-latin characters, but it
might be too difficult and/or cause new problems (using non-ascii
characters).

** Attachment added: "installer_non-latin-trouble.png"
   https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/2018943/+attachment/5671725/+files/installer_non-latin-trouble.png

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https://bugs.launchpad.net/bugs/2018943

Title:
  non latin keyboard doesn't suffice for installation

Status in subiquity package in Ubuntu:
  Confirmed

Bug description:
  Using the new ubuntu installer and picking up a non latin keyboard is not possible to finish the installation. The following names:
  -computer 
  -user
  are not recognized unless latin keyboard is used.

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