Public bug reported:

[Impact]

Since the fix of <https://launchpad.net/bugs/1481025> "cjkv" has been
the system default in im-config for some flavors (e.g. Xubuntu,
Lubuntu), which means that an IM framework is started and configured
only if one of the CJKV languages is the selected display language. For
other languages "cjkv" means that no IM related environment variables
are set (value "none"). However, when starting gnome-language-selector
first time after installation of one of those flavors, the selected IM
method is set to "xim" automatically. This is undocumented behavior, and
the background is commented in the bug description of
<https://launchpad.net/bugs/1585797>.

As illustrated in <https://launchpad.net/bugs/1573755>, the "xim" input
method occasionally causes hard to debug keyboard problems. For this
reason gnome-language-selector should not set "xim", but simply confirm
the "none" default value from im-config.

Some users need "xim" to access X11 dead key and compose key variants,
and this means that they will always need to set it explicitly. The
upside is that users who encounter problems with "xim" will do so as a
result of an active measure, which increases the chance that they
understand the causality.

[Test Case]

On a Xubuntu or Lubuntu system with a non-CJKV display language:

* Remove already set user specific IM configuration:

  rm -f ~/.xinputrc

* Open gnome-language-selector, and find that the selected "keyboard
  input method system" is "XIM".

After installing the proposed version of language-selector-gnome, those
steps instead result in the value "none".

[Regression Potential]

Low. This is only about the default value applied by gnome-language-
selector, so it doesn't change an already set user specific IM
configuration.

** Affects: language-selector (Ubuntu)
     Importance: Medium
     Assignee: Gunnar Hjalmarsson (gunnarhj)
         Status: In Progress

** Affects: language-selector (Ubuntu Xenial)
     Importance: Medium
     Assignee: Gunnar Hjalmarsson (gunnarhj)
         Status: In Progress

** Also affects: language-selector (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: language-selector (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: language-selector (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: language-selector (Ubuntu Xenial)
     Assignee: (unassigned) => Gunnar Hjalmarsson (gunnarhj)

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1605408

Title:
  Don't set IM "xim" by default

Status in language-selector package in Ubuntu:
  In Progress
Status in language-selector source package in Xenial:
  In Progress

Bug description:
  [Impact]

  Since the fix of <https://launchpad.net/bugs/1481025> "cjkv" has been
  the system default in im-config for some flavors (e.g. Xubuntu,
  Lubuntu), which means that an IM framework is started and configured
  only if one of the CJKV languages is the selected display language.
  For other languages "cjkv" means that no IM related environment
  variables are set (value "none"). However, when starting gnome-
  language-selector first time after installation of one of those
  flavors, the selected IM method is set to "xim" automatically. This is
  undocumented behavior, and the background is commented in the bug
  description of <https://launchpad.net/bugs/1585797>.

  As illustrated in <https://launchpad.net/bugs/1573755>, the "xim"
  input method occasionally causes hard to debug keyboard problems. For
  this reason gnome-language-selector should not set "xim", but simply
  confirm the "none" default value from im-config.

  Some users need "xim" to access X11 dead key and compose key variants,
  and this means that they will always need to set it explicitly. The
  upside is that users who encounter problems with "xim" will do so as a
  result of an active measure, which increases the chance that they
  understand the causality.

  [Test Case]

  On a Xubuntu or Lubuntu system with a non-CJKV display language:

  * Remove already set user specific IM configuration:

    rm -f ~/.xinputrc

  * Open gnome-language-selector, and find that the selected "keyboard
    input method system" is "XIM".

  After installing the proposed version of language-selector-gnome,
  those steps instead result in the value "none".

  [Regression Potential]

  Low. This is only about the default value applied by gnome-language-
  selector, so it doesn't change an already set user specific IM
  configuration.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/language-selector/+bug/1605408/+subscriptions

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