[Bug 1946969] Re: ibus-x11 does not start automatically

[Launchpad Bug Tracker]

This bug was fixed in the package mozc - 2.26.4220.100+dfsg-4.1ubuntu0.1

---
mozc (2.26.4220.100+dfsg-4.1ubuntu0.1) impish; urgency=medium

  * Add autostart file to launch Xwayland on startup of wayland session
- Proved to be useful on Ubuntu 21.10 (LP: #1946969)

 -- Gunnar Hjalmarsson   Sat, 16 Oct 2021 21:21:15
+0200

** Changed in: mozc (Ubuntu Impish)
   Status: Fix Committed => Fix Released

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

> This was run on Debian testing (GNOME / Wayland):

Thanks!

Umm... It seems that "DISPLAY=:1" is valid...

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

This was run on Debian testing (GNOME / Wayland):

$ strings /proc/$(pidof ibus-engine-mozc)/environ | grep ^DISPLAY
DISPLAY=:1
$ ls -l /tmp/.X11-unix/
total 0
srwxr-xr-x 1 gunnar gunnar 0 okt 24 19:35 X0
srwxr-xr-x 1 gunnar gunnar 0 okt 24 19:35 X1
srwxr-xr-x 1 Debian-gdm Debian-gdm 0 okt 24 19:35 X1024
srwxr-xr-x 1 Debian-gdm Debian-gdm 0 okt 24 19:35 X1025

But please note that the ibus-x11 process is started on Debian even if
mozc isn't installed.

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

Hi Gunnar,

For future release, I'm trying to figure out the cause this problem.

Here's what we know at this point.

1. DISPLAY=:1

For some reason, the DISPLAY env of ibus-daemon/ibus-engine-mozc is set
to ":1".

$ strings /proc/$(pidof ibus-engine-mozc)/environ | grep ^DISPLAY
DISPLAY=:1

It seems that this should be "DISPLAY=:0".

2. Mozc call functions of libxcb on startup even if session is pure
wayland.

https://github.com/google/mozc/blob/master/src/unix/ibus/selection_monitor.cc#L108-L143

3. xcb_connect() will be blocked infinity.

On Ubuntu, xcb_connect(":1") will be blocked infinity.

You can reproduce this behaviour with simple code.

  * Downlaod sample XCB code on Wikipedia.

https://en.wikipedia.org/wiki/XCB#Example

  * Build sample code

$ sudo apt install gcc libxcb1-dev
$ gcc test.c -o test -lxcb

  * Do logout and login and confirm not start Xwayland process

$ ps -fe | grep -i xwayland
(check no xwayland process)

  * Check exists ":1" socket

$ ls -l /tmp/.X11-unix/X1
/tmp/.X11-unix/X1
  
  * Execute thesample program with DISPLAY=":1"

DISPLAY=":1" ./test

The sample program will be blocked. You can comfirm this is blocked on
connect() via xcb_connect().

---

However I doesn't investigate how about Debian testing.

Could you check following status?

* What value of $DISPLAY of ibus-engin-mozc:
  $ strings /proc/$(pidof ibus-engine-mozc)/environ | grep ^DISPLAY

* How number of x11 unix socket
  $ ls -l /tmp/.X11-unix/

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Ikuya Awashiro]

** Tags removed: verification-needed-impish
** Tags added: verification-done-impish

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Ikuya Awashiro]

mozc 2.26.4220.100+dfsg-4.1ubuntu0.1 works as expected.
Thanks!

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Brian Murray]

Hello Ikuya, or anyone else affected,

Accepted mozc into impish-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/mozc/2.26.4220.100+dfsg-4.1ubuntu0.1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
impish to verification-done-impish. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-impish. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: mozc (Ubuntu Impish)
   Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-impish

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Launchpad Bug Tracker]

This bug was fixed in the package mozc - 2.26.4220.100+dfsg-5.1

---
mozc (2.26.4220.100+dfsg-5.1) unstable; urgency=medium

  * Non-maintainer upload
  * Add autostart file to launch Xwayland on startup of wayland session
- Proved to be useful on Ubuntu 21.10 (LP: #1946969)

 -- Gunnar Hjalmarsson   Sat, 16 Oct 2021 21:11:28
+0200

** Changed in: mozc (Ubuntu)
   Status: In Progress => Fix Released

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

Thanks for editing the description! Ok, then let's get the ball rolling.

I uploaded the change to Debian unstable (to sync later) and to the
impish unapproved queue.

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

Hi Gunnar,

> New proposal in this PPA:

Many many thanks, confirmation and new patch.

I tried it on 21.10, and works great.


> Also, can someone please make the bug description 'SRU compatible':

I updated description.

** Description changed:

+ [Impact]
+ 
+ This is bugfix SRU.
+ 
+ The mainly problem is user cannot input Japanese language with
+ IBus/Mozc.
+ 
+ One of the causes is Xwayland will not start on 21.10.
+ If there is no Xwayland process, gnome-shell/mutter will drop "--xim"
+ option of ibus-daemon and ibus-x11 process doesn't start.
+ 
+ For reasons unknown, IBus/Mozc does not work as a result.
+ 
+ Essentially, it should be fixed so that it works without Xwayland
+ and ibus-x11, but it takes time to investigate, so we will workaround
+ it by forcing Xwayland to start by xrefresh command.
+ 
+ 
+ [Test Plan]
+ 
+ 1. run Ubuntu 21.10 installer
+ 2. select Japanese language and keyboard
+ 3. finish to install and reboot
+ 4. login and complete gnome-initial-setup
+ 5. apply the mozc SRU and reboot
+ 6. login
+ 7. press Windows key + Space key and select Japanese (Mozc)
+ 8. startup gedit
+ 9. press Hankaku/Zenkaku key
+ 
+ If you can input Japanese language, then test is ok.
+ 
+ 
+ [Where problems could occur]
+ 
+ * Only affects to mozc installed machine, it is mainly Japanese user's 
machine.
+ * The worst case is that those user cannot input Japanese language if the 
update is invalid.
+ * However current 21.10 is already same state.
+ 
+ 
+ [Original description]
+ 
  ibus-x11 does not start automatically due to Xwayland on demand by default.
  IBus user does not input any cjkv languages before start to ibus-x11 or 
xwayland process.
  
  Steps to reproduce:
  
  1. run Ubuntu 21.10 installer
  2. select Japanese language
  3. finish to install and reboot
  4. login
  5. reboot
  6. login
  7. push Windows key + Space key and select Japanese (Mozc)
  8. run gedit
  9. push Hankaku/Zenkaku key
  
  Expected results:
  
  show any Japanese characters
  
  Actual results:
  
  input any alphabetical key which I push
  
  observation:
  
  This may be mutter's matter.
  Xwayland on demand by default
  https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1673
  
  workaround:
  
  1. run gnome-terminal and run command "ibus-daemon -rxd"
  2. run any xwayland application like Libreoffice
  3. use X session
  4. restart IBus automatically when log in
  
  exaple:
  $ sudo editor /etc/xdg/autostart/ibus-autostart.desktop
  
  [Desktop Entry]
  Name=ibus-autostart
  Exec=sh -c 'if [ "${IM_CONFIG_CHECK_ENV}" = "1" ] && [ "${XDG_SESSION_TYPE}" 
= "wayland" ] && [ "${XDG_CURRENT_DESKTOP}" = "ubuntu:GNOME" ] || [ 
"${XDG_CURRENT_DESKTOP}" = "GNOME" ]; then ibus-daemon -rxd true; fi'
  TryExec=ibus-daemon
  Type=Application

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

I tested multiple IBus IMs, and AFAICT the issue is a pure ibus-mozc
one. Consequently I now believe that a reasonable solution is to let the
ibus-mozc package install an autostart file for launching Xwayland. That
way users who don't use ibus-mozc won't be affected.

New proposal in this PPA:

https://launchpad.net/~gunnarhj/+archive/ubuntu/mozc

If you agree, I'm ready to upload. Let me know.

Also, can someone please make the bug description 'SRU compatible':

https://wiki.ubuntu.com/StableReleaseUpdates#SRU_Bug_Template

** Also affects: mozc (Ubuntu)
   Importance: Undecided
   Status: New

** No longer affects: gnome-shell (Ubuntu)

** No longer affects: im-config (Ubuntu)

** No longer affects: mutter (Ubuntu)

** Also affects: mozc (Ubuntu Impish)
   Importance: Undecided
   Status: New

** Changed in: mozc (Ubuntu)
   Status: New => In Progress

** Changed in: mozc (Ubuntu)
 Assignee: (unassigned) => Gunnar Hjalmarsson (gunnarhj)

** Changed in: mozc (Ubuntu Impish)
   Importance: Undecided => High

** Changed in: mozc (Ubuntu Impish)
   Status: New => In Progress

** Changed in: mozc (Ubuntu Impish)
 Assignee: (unassigned) => Gunnar Hjalmarsson (gunnarhj)

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

> I just found that this problem is not present in Debian testing

Indeed, Xwayland is living on Debian/testing and ibus-daemon is
restarted with --xim by gnome-shell. However xlsclients show only
ibus-x11/gsd-xsettings/gnome-shell only.

Is any X11 related process started and then closed?

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

I submitted  to involve the
desktop team in the solution.

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

I just found that this problem is not present in Debian testing, even if
they have the same version of both mutter and ibus. Something seems to
make Xwayland start at login, and hence ibus-x11 is also running.

That speaks against using im-config to work around it, since im-config
is used by both Debian and Ubuntu.

I think we need to ask the Ubuntu desktop folks for advice.

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

> When that reaches Debian, there is a risk that Ubuntu's desktop team
won't accept to keep mozc in main (and on the ISO).

I think so too. Unfortunately the Qt renderer and Gtk renderer seem to
be exclusive at the moment. We still need Gtk renderer.

> > However ibus-x11 process is doubled, it is ok?

> Yeah, I saw that and assumed that it won't hurt... Is that duplication
avoided with your idea with xrefresh (a command whose existence I wasn't
aware of)? If it is, maybe that's a better approach.

Thanks confirm. I agree to adopt im-config approach. Please SRU it.

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

On 2021-10-14 15:43, Ikuya Awashiro wrote:
>> It would be good if any of you could submit an upstream GNOME issue.
> I think it is not mutter or gnome-shell issue but ibus-mozc issue.
> ibus-mozc should work under wayland session.
> Latest Mozc renderer was completely re-written.
> https://github.com/google/mozc/commit/3b3068e924e17f8820a35899f105f2ef838d0535
> I will try it later.

Hmm.. My thoughts in response to that:

* The commit message says: "Initial implementation of Qt-based
renderer". When that reaches Debian, there is a risk that Ubuntu's
desktop team won't accept to keep mozc in main (and on the ISO). Please
remember that mozc-utils-gui is already not in main due to the qt
dependencies.

* I assumed that the issue may be present also for other IBus IMs, which
is why I proposed a general workaround in im-config. But if it's a pure
mozc thing, it may be better to let the ibus-mozc package install a
separate autostart file in line with what you and Mitsuya discuss above.

On 2021-10-14 15:46, Mitsuya Shibata wrote:
> However ibus-x11 process is doubled, it is ok?

Yeah, I saw that and assumed that it won't hurt... Is that duplication
avoided with your idea with xrefresh (a command whose existence I wasn't
aware of)? If it is, maybe that's a better approach.

Anyway, thanks both for confirming that the proposal in the PPA works.
But I'm not sure ATM that doing it in im-config is right.

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

Hi Gunnar,

> In the meantime im-config is the natural package for a workaround.
This PPA:

It works for me. Thank you for your quick response!

However ibus-x11 process is doubled, it is ok?

PIDPGID SID TTY  STAT   TIME COMMAND
   140014001400 ?Ssl0:00 
/usr/libexec/gnome-session-binary --systemd-service --session=ubuntu
(snip)
   143814381438 ?Ssl0:12 /usr/bin/gnome-shell
   172414381438 ?Sl 0:00   /usr/bin/Xwayland :0 
-rootless -noreset -accessx -core -auth 
/run/user/1000/.mutter-Xwaylandauth.EDN3A1 -listen 4 -listen 5 -displayfd 6 
-initfd 7
   177117711438 ?Sl 0:01   ibus-daemon --panel disable 
-r --xim
   179217711438 ?Sl 0:00 /usr/libexec/ibus-dconf
   179417711438 ?Sl 0:01 
/usr/libexec/ibus-extension-gtk3
   184417711438 ?Sl 0:00 
/usr/lib/ibus-mozc/ibus-engine-mozc --ibus
   184717711438 ?SLl0:00   /usr/lib/mozc/mozc_server
(snip)
   170416961400 ?Sl 0:00 /usr/libexec/ibus-x11 
--kill-daemon
   177617761776 ?Ssl0:00 /usr/libexec/gsd-xsettings
   180317711438 ?Sl 0:00 /usr/libexec/ibus-x11 
--kill-daemon
   180713021302 ?Sl 0:00 /usr/libexec/ibus-portal

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Ikuya Awashiro]

Thank you for your comments!

> However to reproduce this behaviour, you need to reboot on twice, isn't it?
Yes. You are right. Always right.

> It would be good if any of you could submit an upstream GNOME issue.
I think it is not mutter or gnome-shell issue but ibus-mozc issue.
ibus-mozc should work under wayland session.
Latest Mozc renderer was completely re-written.
https://github.com/google/mozc/commit/3b3068e924e17f8820a35899f105f2ef838d0535
I will try it later.

> Please let me know if you consider the im-config change to be sufficient, and 
> also if you see any adverse side effects.
This change works great for me. Thank you for your work.

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Ikuya Awashiro]

** Description changed:

  ibus-x11 does not start automatically due to Xwayland on demand by default.
  IBus user does not input any cjkv languages before start to ibus-x11 or 
xwayland process.
  
  Steps to reproduce:
  
  1. run Ubuntu 21.10 installer
  2. select Japanese language
  3. finish to install and reboot
  4. login
- 5. push Windows key + Space key and select Japanese (Mozc)
- 6. run gedit
- 7. push Hankaku/Zenkaku key
+ 5. reboot
+ 6. login
+ 7. push Windows key + Space key and select Japanese (Mozc)
+ 8. run gedit
+ 9. push Hankaku/Zenkaku key
  
  Expected results:
  
  show any Japanese characters
  
  Actual results:
  
  input any alphabetical key which I push
  
  observation:
  
- This may be mutter's matter. 
+ This may be mutter's matter.
  Xwayland on demand by default
  https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1673
  
  workaround:
  
  1. run gnome-terminal and run command "ibus-daemon -rxd"
  2. run any xwayland application like Libreoffice
  3. use X session
  4. restart IBus automatically when log in
  
- exaple: 
+ exaple:
  $ sudo editor /etc/xdg/autostart/ibus-autostart.desktop
  
  [Desktop Entry]
  Name=ibus-autostart
  Exec=sh -c 'if [ "${IM_CONFIG_CHECK_ENV}" = "1" ] && [ "${XDG_SESSION_TYPE}" 
= "wayland" ] && [ "${XDG_CURRENT_DESKTOP}" = "ubuntu:GNOME" ] || [ 
"${XDG_CURRENT_DESKTOP}" = "GNOME" ]; then ibus-daemon -rxd true; fi'
  TryExec=ibus-daemon
  Type=Application

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

Hi Osamu,

This issue is reasonably present in bookworm too, and also your eyes on
the patch in the PPA would be appreciated. Especially there is one thing
I'm not sure about: To make it work I had to set IM_CONFIG_CHECK_ENV=0,
and with that bypass the check in im-launch.

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Title:
  ibus-x11 does not start automatically

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Gunnar Hjalmarsson]

Hi Ikuya, Mitsuya!

Confirmed here as well.

My understanding is that not all IBus IMs need ibus-x11, which may
explain why the GNOME folks didn't notice this issue as regards ibus-
mozc. It would be good if any of you could submit an upstream GNOME
issue. I suppose that candidate projects are mutter and gnome-shell.

In the meantime im-config is the natural package for a workaround. This
PPA:

https://launchpad.net/~gunnarhj/+archive/ubuntu/im-config

contains a modified im-config, which I think deals with the issue for
now. I chose to edit two existing files instead of adding yet another
autostart script.

Please let me know if you consider the im-config change to be
sufficient, and also if you see any adverse side effects. If it's ok, we
should make an SRU soon after the 21.10 release.

** Package changed: ubuntu => im-config (Ubuntu)

** Changed in: im-config (Ubuntu)
   Importance: Undecided => High

** Changed in: im-config (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: im-config (Ubuntu)
 Assignee: (unassigned) => Gunnar Hjalmarsson (gunnarhj)

** Also affects: gnome-shell (Ubuntu)
   Importance: Undecided
   Status: New

** Also affects: mutter (Ubuntu)
   Importance: Undecided
   Status: New

** Tags added: impish regression-release

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  ibus-x11 does not start automatically

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

>  4. restart IBus automatically when log in

More simple, but identical workaround:

---
cat <<'EOF' | sudo tee /etc/xdg/autostart/launch-xwayland.desktop
[Desktop Entry]
Name=Launch XWayland on startup
Exec=sh -c 'if [ "x$XDG_SESSION_TYPE" = "xwayland" ] ; then xrefresh; fi'
TryExec=xrefresh
Type=Application
EOF
---

* xrefresh just refresh X screen.
* if there is no ibus, this command will startup xwayland and refresh screen 
only.
* if there is ibus, Mutter will startup XWayland and GNOME Shell restart 
ibus-daemon with --xim option
* at the moment, Mutter doesn't remove xwayland even if all x11 apps exited.

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  ibus-x11 does not start automatically

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

I can reproduced this issue in new installed impish.
However to reproduce this behaviour, you need to reboot on twice, isn't it?

First reboot will startup gnome-initial setup with GNOME_SETUP_DISPLAY,
this environment variable will cause starting ibus-daemon with "--xim"
option.

GNOME Shell drop "--xim" option[1] on wayland session[2] and there is no
x11 apps.

[1] 
https://gitlab.gnome.org/GNOME/gnome-shell/-/commit/8adfc5b106d373bdae83b9a7b32e995f2a0d8331
[2] 
https://gitlab.gnome.org/GNOME/gnome-shell/-/commit/1a0ec782b521dbcb66c31fe6f56784127f71926a

Anyway, mozc require ibus-x11? or all ibus related ime require ibus-x11
on wayland?

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  ibus-x11 does not start automatically

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Mitsuya Shibata]

** Changed in: ubuntu
   Status: New => Confirmed

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Ubuntu Foundations Team Bug Bot]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.  It seems that your bug report is not filed about a
specific source package though, rather it is just filed against Ubuntu
in general.  It is important that bug reports be filed about source
packages so that people interested in the package can find the bugs
about it.  You can find some hints about determining what package your
bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage.
You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

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package name in the text box next to the word Package.

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** Tags added: bot-comment

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[Bug 1946969] Re: ibus-x11 does not start automatically

[Ikuya Awashiro]

Hi Gunnar-san and Shibata-san, please take a look.
Anyone report such a problem. Is it my fault?

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