Unusual Region & Language settings on Live Session after clicking "Try Ubuntu"

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1796722

Thanks for your report.

Jun Kobayashi wrote:
> Steps to Reproduce 3:
> 1. boot virtual pc with cosmic-desktop-amd64.iso
> 2. wait for Ubiquity dialoge and select "日本語"
> 3. click "Ubuntuを試す" button
> 4. wait for Live Session
> 5. input source selection menu is shown on right of topbar, including
> "ja1", "ja2", "ja3" and "ja4"
> 6. open Settings app and select "Region & Language"
> 7. 4 input sources listed: Japanese, Japanese (PC-98), Japanese (OADG
> 109A), Japanese (Dvorak)
> This setting don't supports inputting Japanese.

The fact that Mozc isn't available is indeed an issue. It sounds to me as the same issue as the one reported at bug #1786344. Do you agree on that?

Besides that, it's unclear to me how your other observations are problems. If you think they are, please let us know what you think should be the expected behavior in the various examples.

Thank you for your reply.

> The fact that Mozc isn't available is indeed an issue. It sounds to me
> as the same issue as the one reported at bug #1786344. Do you agree on
> that?

It seems to me this bug is a little different from the bug #1786344.
Comment #10 of the bug #1786344 you wrote could be related this bug,
but other comments may be related to other problem on inputting chinese.

> Besides that, it's unclear to me how your other observations are
> problems. If you think they are, please let us know what you think
> should be the expected behavior in the various examples.

This bug occurs only after maybe-ubiquity mode(ubiquity --greeter).
According to the bug #1766047, it's impossible to boot in maybe-ubiquity mode
when booting in UEFI. So this bug occurs when booting in legacy BIOS.

When choosing 日本語(Japanese) on isolinux menu and select
インストールせずにUbuntuを試してみる(Try Ubuntu without installing),
I can use Mozc without problems on live session.
dconf shows ('ibus', 'mozc-jp') for input-sources as follows.
This is totally expected behavior.
--
ubuntu@ubuntu:~$ cat /proc/cmdline
file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- debian-installer/language=ja keyboard-configuration/layoutcode?=jp keyboard-configuration/modelcode?=jp106
ubuntu@ubuntu:~$ dconf dump /org/gnome/desktop/input-sources/
[/]
sources=[('xkb', 'jp'), ('ibus', 'mozc-jp')]
xkb-options=['lv3:ralt_switch']
--

But when waiting for ubiquity greeter dialog, select 日本語(Japanese), click Ubuntuを試す(Try Ubuntu),
I can't use Mozc on live session.
no ('ibus', 'mozc-jp') for input-sources and rarely used Japanese input sources are listed as follows.
--
ubuntu@ubuntu:~$ cat /proc/cmdline
file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- maybe-ubiquity
ubuntu@ubuntu:~$ dconf dump /org/gnome/desktop/input-sources/
[/]
sources=[('xkb', 'jp'), ('xkb', 'nec_vndr/jp'), ('xkb', 'jp+OADG109A'), ('xkb', 'jp+dvorak')]
xkb-options=@as []
--

I tried selecting other languages, the result is as follows.

Select Simplified Chinese on isolinux menu:
--
ubuntu@ubuntu:~$ cat /proc/cmdline
file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- locale=zh_CN keyboard-configuration/layoutcode?=cn
ubuntu@ubuntu:~$ dconf dump /org/gnome/desktop/input-sources/
[/]
sources=[('xkb', 'cn'), ('ibus', 'libpinyin')]
xkb-options=['lv3:ralt_switch']
--
I don't know this is ideal settings for Chinese or not, but it includes ('ibus', 'libpinyin') anyway.

Select Simplified Chinese on Ubiquity Greeter:
--
ubuntu@ubuntu:~$ cat /proc/cmdline
file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- maybe-ubiquity
ubuntu@ubuntu:~$ dconf dump /org/gnome/desktop/input-sources/
[/]
sources=[('xkb', 'cn')]
xkb-options=@as []
--
Only [('xkb', 'cn')] is. This is the same as comment #10 of bug #1786344.

Select English on isolinux menu:
--
ubuntu@ubuntu:~$ cat /proc/cmdline
file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash ---
ubuntu@ubuntu:~$ dconf dump /org/gnome/desktop/input-sources/
[/]
sources=[('xkb', 'us')]
xkb-options=@as []
--

Select English on Ubiquity Greeter:
--
u...

#7 is accidentally posted.

I don't know much about other than Janpanese, but I can confirm input-souces
settings are different between "choosing language on isolinux menu" and
"choosing langage on Ubiquity Greeter" for above languages.

Hope this clarifies the issue.

I am going to mark this as a duplicate of bug 1786344. That bug is about both Chinese and Japanese.

Thank you for taking the time to report this bug and help make Ubuntu better.

On 2018-10-12 04:43, Jun Kobayashi wrote:
> It seems to me this bug is a little different from the bug #1786344.
> Comment #10 of the bug #1786344 you wrote could be related this bug,
> but other comments may be related to other problem on inputting
> chinese.

Yeah, but please note that one of the issues, which was originally reported on bug #1786344, was moved to bug #1789665. So I agree with Jeremy that this is actually a duplicate of the remaining issue there.