Plasma keyboard crashes constantly - but it isn't used at all

hcastorp · March 16, 2026, 8:40pm

So after Fedora introduced (switched?) the virtual keyboard to the “Plasma Keyboard”, the Maliit keyboard stopped crashing, but instead the Plasma Keyboard keeps crashing. Setting Virtual Keyboard to “None” doesn’t work, as that selection is immediately reverted.

The crash doesn’t seem to affect usability at all, but it starts to get annoying. So if there is a way to disable the virtual keyboard completely, that would be nice.

Is it safe to remove all those virtual keyboards?

Here is the crash dump information from the most recent crash.

           PID: 9452 (plasma-keyboard)
           UID: 1000 (*****)
           GID: 1000 (*****)
        Signal: 11 (SEGV)
     Timestamp: Mon 2026-03-16 21:29:03 CET (19s ago)
  Command Line: /usr/bin/plasma-keyboard
    Executable: /usr/bin/plasma-keyboard
 Control Group: /user.slice/user-1000.slice/user@1000.service/session.slice/plasma-kwin_wayland.service
          Unit: user@1000.service
     User Unit: plasma-kwin_wayland.service
         Slice: user-1000.slice
     Owner UID: 1000 (*****)
       Boot ID: de87969a062c4f8aa4eb1c3365ec9eef
    Machine ID: 844e56089f8e4185b8b13d3acfe8b951
      Hostname: ****
      Storage: /var/lib/systemd/coredump/core.plasma-keyboard.1000.de87969a062c4f8aa4eb1c3365ec9eef.9452.1773692943000000.zst (present)
  Size on Disk: 11M
       Package: plasma-keyboard/6.6.1-1.fc43
      build-id: ceafc791880aaac8885490a4c5aa1578189bb5bc
       Message: Process 9452 (plasma-keyboard) of user 1000 dumped core.
                
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                Module libkeyutils.so.1 from rpm keyutils-1.6.3-6.fc43.x86_64
                Module libkrb5support.so.0 from rpm krb5-1.22.2-2.fc43.x86_64
                Module libcom_err.so.2 from rpm e2fsprogs-1.47.3-2.fc43.x86_64
                Module libk5crypto.so.3 from rpm krb5-1.22.2-2.fc43.x86_64
                Module libkrb5.so.3 from rpm krb5-1.22.2-2.fc43.x86_64
                Module libicudata.so.77 from rpm icu-77.1-1.fc43.x86_64
                Module libbz2.so.1 from rpm bzip2-1.0.8-21.fc43.x86_64
                Module libgraphite2.so.3 from rpm graphite2-1.3.14-19.fc43.x86_64
                Module libXext.so.6 from rpm libXext-1.3.6-4.fc43.x86_64
                Module libpcre2-8.so.0 from rpm pcre2-10.47-1.fc43.x86_64
                Module libxcb.so.1 from rpm libxcb-1.17.0-6.fc43.x86_64
                Module libxml2.so.2 from rpm libxml2-2.12.10-5.fc43.x86_64
                Module libGLdispatch.so.0 from rpm libglvnd-1.7.0-8.fc43.x86_64
                Module libproxy.so.1 from rpm libproxy-0.5.12-1.fc43.x86_64
                Module libbrotlidec.so.1 from rpm brotli-1.2.0-1.fc43.x86_64
                Module libgssapi_krb5.so.2 from rpm krb5-1.22.2-2.fc43.x86_64
                Module libQt6QmlWorkerScript.so.6 from rpm qt6-qtdeclarative-6.10.2-2.fc43.x86_64
                Module libcap.so.2 from rpm libcap-2.76-3.fc43.x86_64
                Module libcrypto.so.3 from rpm openssl-3.5.4-2.fc43.x86_64
                Module libpcre2-16.so.0 from rpm pcre2-10.47-1.fc43.x86_64
                Module libb2.so.1 from rpm libb2-0.98.1-14.fc43.x86_64
                Module libdouble-conversion.so.3 from rpm double-conversion-3.4.0-1.fc43.x86_64
                Module libsystemd.so.0 from rpm systemd-258.7-1.fc43.x86_64
                Module libzstd.so.1 from rpm zstd-1.5.7-2.fc43.x86_64
                Module libicuuc.so.77 from rpm icu-77.1-1.fc43.x86_64
                Module libicui18n.so.77 from rpm icu-77.1-1.fc43.x86_64
                Module libdbus-1.so.3 from rpm dbus-1.16.0-4.fc43.x86_64
                Module libz.so.1 from rpm zlib-ng-2.3.3-1.fc43.x86_64
                Module libfreetype.so.6 from rpm freetype-2.13.3-3.fc43.x86_64
                Module libharfbuzz.so.0 from rpm harfbuzz-11.5.1-2.fc43.x86_64
                Module libpng16.so.16 from rpm libpng-1.6.55-1.fc43.x86_64
                Module libOpenGL.so.0 from rpm libglvnd-1.7.0-8.fc43.x86_64
                Module libGLX.so.0 from rpm libglvnd-1.7.0-8.fc43.x86_64
                Module libglib-2.0.so.0 from rpm glib2-2.86.4-1.fc43.x86_64
                Module libX11.so.6 from rpm libX11-1.8.12-1.fc43.x86_64
                Module libfontconfig.so.1 from rpm fontconfig-2.17.0-3.fc43.x86_64
                Module libEGL.so.1 from rpm libglvnd-1.7.0-8.fc43.x86_64
                Module libwayland-cursor.so.0 from rpm wayland-1.24.0-1.fc43.x86_64
                Module libQt6OpenGL.so.6 from rpm qt6-qtbase-6.10.2-2.fc43.x86_64
                Module libQt6Network.so.6 from rpm qt6-qtbase-6.10.2-2.fc43.x86_64
                Module libQt6QmlModels.so.6 from rpm qt6-qtdeclarative-6.10.2-2.fc43.x86_64
                Module libQt6QmlMeta.so.6 from rpm qt6-qtdeclarative-6.10.2-2.fc43.x86_64
                Module libffi.so.8 from rpm libffi-3.5.2-1.fc43.x86_64
                Module libudev.so.1 from rpm systemd-258.7-1.fc43.x86_64
                Module libQt6Core.so.6 from rpm qt6-qtbase-6.10.2-2.fc43.x86_64
                Module libQt6DBus.so.6 from rpm qt6-qtbase-6.10.2-2.fc43.x86_64
                Module libQt6Gui.so.6 from rpm qt6-qtbase-6.10.2-2.fc43.x86_64
                Module libQt6WaylandClient.so.6 from rpm qt6-qtbase-6.10.2-2.fc43.x86_64
                Module libxkbcommon.so.0 from rpm libxkbcommon-1.11.0-1.fc43.x86_64
                Module libQt6Qml.so.6 from rpm qt6-qtdeclarative-6.10.2-2.fc43.x86_64
                Module libQt6Quick.so.6 from rpm qt6-qtdeclarative-6.10.2-2.fc43.x86_64
                Module libKF6ConfigCore.so.6 from rpm kf6-kconfig-6.23.0-1.fc43.x86_64
                Module libKF6I18n.so.6 from rpm kf6-ki18n-6.23.0-1.fc43.x86_64
                Module libwayland-client.so.0 from rpm wayland-1.24.0-1.fc43.x86_64
                Module libQt6VirtualKeyboard.so.6 from rpm qt6-qtvirtualkeyboard-6.10.2-1.fc43.x86_64
                Module libKF6ConfigGui.so.6 from rpm kf6-kconfig-6.23.0-1.fc43.x86_64
                Module libKF6I18nQml.so.6 from rpm kf6-ki18n-6.23.0-1.fc43.x86_64
                Module libKF6CoreAddons.so.6 from rpm kf6-kcoreaddons-6.23.0-1.fc43.x86_64

The full dump is available here: notebin.de | Pastebin

moschlegbz · March 16, 2026, 9:25pm

I think this is a known bug (REF: Bug List ), there are in fact many many duplicates in there.

I simply go into “System Settings” → Keyboard → “Virtual Keyboard” and set it to “IBus Wayland” and Apply that. I don’t use any of those virtual keyboards but like you I don’t want all the crashing spam in the logs, so IBus works so it’s pointed to something not crashy. KDE 6.6.3 bug fixes are due on 03/17 (REF: Schedules/Plasma 6 - KDE Community Wiki ) so maybe that would resolve that.

You can’t remove the plasma-keyboard package since it’s a deep dependency into KDE, at least on Fedora it is. So setting it to IBus Wayland is a good workaround for now.

hcastorp · March 16, 2026, 9:48pm

Thanks for the quick answer.

Setting it to IBus seems to work. I only tried “None” which never persisted.

moschlegbz · April 11, 2026, 2:55pm

KDE bugfix package set 6.6.4 just came out April 07,

maybe it resolves that. I’m on Fedora 44 and it’s not out yet for it.

The “plasma-keyboard” changelog in that says:

plasma-keyboard

Inputlisteneritem: Always disable predictive text. Commit. Fixes bug #516511
Inputlisteneritem: Add bytes bound check and deactivate signal handling. Commit. Fixes bug #517087
Vkbd: Fix various lengths not being bytes (UTF8), and CJK attributes. Commit.
Inputlisteneritem: Don't let Qt VKBD communicate to KWin when not visible. Commit. Fixes bug #516511
Fix(qwaylandinputpanelsurface): Handle nullptrs when configuring. Commit.

moschlegbz · April 20, 2026, 5:26pm

Just confirming something, I now do have “6.6.4” bugfix set installed on my Fedora 44 Beta (in freeze now). I now manually set the Keyboard → Virtual Keyboard in System Settings from the IBus Wayland one to be Plasma Keyboard again and then logged out and back in. I don’t use the V Keyboard but that doesn’t matter because when I was getting SIGSEGVs from it, it was simply from plasma-keyboard even being idle. Anyway, I can confirm that plasma-keyboard is not flooding my system with crashes any more.

# ps -ef | grep plasma-keyboard
user        15004   14950  0 12:46 ?        00:00:02 /usr/bin/plasma-keyboard

# date -R
Mon, 20 Apr 2026 13:23:54 -0400

# coredumpctl list
No coredumps found.

Before it would have left some dumps after that much time (~45 mins)