Bug 2428613

Seems Fedora 44 switches Budgie to Wayland.
https://fedoraproject.org/wiki/Changes/Budgie_10.10

I tried Fedora 43 Budgie Xorg not 44 yet.

Reading the document, it uses labwc.
https://docs.buddiesofbudgie.org/10.10/developer/workflow/building-budgie-desktop

Probably you could use IBus Wayland input-method protocol V2 with `ibus start` command.

I'm not sure if budgie-session runs ibus-daemon but you could the parent process of ibus-daemon with `ps -ef | grep ibus-daemon` and `pstree -asp $PID`.

If yes, it would be a failure of the Budgie session and you need to terminate ibus processes at once:

% ibus exit
% ibus start --verbose

Probably you could refer the XFCE - Labwc configuration:
https://github.com/ibus/ibus/wiki/WaylandDesktop#xfce

Okay I think I have managed to pinpoint the issue. So IBus is loading these modules (QT_IM_MODULE and
GTK_IM_MODULE) under some legacy x11 settings. 

Now that Budgie 10.10 is wayland only it has no need for them. Wayland uses a new "Text-Input" protocol where apps talk directly to the compositor (labwc), not to IBus via a module.

File can be located at: grep -r "QT_IM_MODULE" /etc/ /usr/lib/environment.d/ 2>/dev/null

/etc/X11/xinit/xinput.d/ibus.conf:    QT_IM_MODULE=ibus

/etc/X11/xinit/xinput.d/ibus.conf:    QT_IM_MODULE=xim

Either SDDM or budgie I think is activating Ibus to load these modules but we dont need them.
env | grep IM_MODULE

QT_IM_MODULE=ibus

Expected Results: In a pure Wayland session (Budgie 10.10), no legacy IM_MODULE environment variables should be exported. The system should rely on the Wayland Text-Input Protocol handled by the compositor (labwc).

(In reply to fujiwara from comment #1)
> Seems Fedora 44 switches Budgie to Wayland.
> https://fedoraproject.org/wiki/Changes/Budgie_10.10
> 
> I tried Fedora 43 Budgie Xorg not 44 yet.
> 
> Reading the document, it uses labwc.
> https://docs.buddiesofbudgie.org/10.10/developer/workflow/building-budgie-
> desktop
> 
> Probably you could use IBus Wayland input-method protocol V2 with `ibus
> start` command.
> 
> I'm not sure if budgie-session runs ibus-daemon but you could the parent
> process of ibus-daemon with `ps -ef | grep ibus-daemon` and `pstree -asp
> $PID`.
> 
> If yes, it would be a failure of the Budgie session and you need to
> terminate ibus processes at once:
> 
> % ibus exit
> % ibus start --verbose
> 
> Probably you could refer the XFCE - Labwc configuration:
> https://github.com/ibus/ibus/wiki/WaylandDesktop#xfce

@fujiwara

Further clarify my findings.
the following is the problem, based on the error notfication ibus should be configured through desktop session settings(budgie-desktop-services).
Then Budgie 10.10 doesn't appear to have a graphical input method configuration UI like KDE or GNOME.
The ibus labwc documentation shows "Labwc does not provide the session configuration(/etc/xdg/labwc) by default and it's available in /usr/share/doc/labwc directory and labwc-config(5)." so no auto-start.
Requiring manual input of ibus start --type wayland. 

Also ensure environment variables are unset, any of the x11 dependent packages.
GTK_IM_MODULE|QT_IM_MODULE|XMODIFIERS"
XMODIFIERS=@im=ibus
QT_IM_MODULE=ibus
bhoward@fedora:~$ ps aux | grep ibus-daemon
bhoward    10433  0.0  0.3 612988 14316 ?        Sl   17:37   0:00 ibus-daemon --xim --panel disable
bhoward    20723  0.0  0.0 231440  2572 pts/0    S+   17:41   0:00 grep --color=auto ibus-daemon
this shows the ibus-dameon is running but in  GNOME x11 mode

then within the ibus settings is imsettings which is just configured like so ...
XIM_ARGS="-r --xim"           # <- This is why ibus starts with --xim flag
GTK_IM_MODULE=ibus
QT_IM_MODULE=ibus
NOT_RUN=gnome3
IMSETTINGS_IGNORE_SESSION=KDE-wayland   # <- Only ignores KDE-wayland, not Budgie!

Because of this x11 settings are being forced even though budgie 10.10 is now wayland only.

(In reply to yusufxkhalid from comment #2)
> /etc/X11/xinit/xinput.d/ibus.conf:    QT_IM_MODULE=ibus

Budgie Wayland DE does not need ibus-xinit package and should be deleted.

(In reply to yusufxkhalid from comment #3)
> IMSETTINGS_IGNORE_SESSION=KDE-wayland   # <- Only ignores KDE-wayland, not
> Budgie!

I don't think it's good solution to update that value by DE at present.

If you still require ibus-xinit package, you could run im-chooser and disable ibus.

You still don't reply my query but added unnecessary needinfo flag:

(In reply to fujiwara from comment #1)
> I'm not sure if budgie-session runs ibus-daemon but you could the parent
> process of ibus-daemon with `ps -ef | grep ibus-daemon` and `pstree -asp
> $PID`.

But probably your issue would not be ibus.

(In reply to yusufxkhalid from comment #3)
> The ibus labwc documentation shows "Labwc does not provide the session
> configuration(/etc/xdg/labwc) by default and it's available in
> /usr/share/doc/labwc directory and labwc-config(5)." so no auto-start.
> Requiring manual input of ibus start --type wayland. 

I didn't indicate /etc file see the configuration:

(In reply to fujiwara from comment #1)
> Probably you could refer the XFCE - Labwc configuration:
> https://github.com/ibus/ibus/wiki/WaylandDesktop#xfce

I verified Budgie Wayland works fine in Fedora 44.
https://github.com/ibus/ibus/wiki/WaylandDesktop#budgie