Bug 514376 - Launcher doesn't respond - doesn't show up after pressing configured shortcut
Summary: Launcher doesn't respond - doesn't show up after pressing configured shortcut
Status: REOPENED
Alias: None
Product: kwin
Classification: Plasma
Component: general (other bugs)
Version First Reported In: 6.5.4
Platform: Kubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-01-09 17:02 UTC by luk
Modified: 2026-01-15 23:40 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
Attached journalctl logs (82.68 KB, text/x-log)
2026-01-09 17:02 UTC, luk
Details

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Description luk 2026-01-09 17:02:23 UTC
Created attachment 188354 [details]
Attached journalctl logs

`Application Dashboard` doesn't respond - doesn't show up after pressing configured shortcut
it happened second time now, by default it's under 'Meta', I press meta, nothing happens, but the key still works, I can use it like Meta-PgDn for windows movement.
When I configure Activate Application Launcher with other shortcut, like Ctrl-Shift-G, it still doesn't work.

When I open it with mouse click, I can choose an app, but it freezes, sometimes it runs selected app after 10 seconds.


STEPS TO REPRODUCE
It just happened second time, I don't know how to reproduce.

OBSERVED RESULT
also I see notification after a moment:

Launching system settings failed:  (or Launching Kcalc failed)
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. 

but KCalc was launched in fact.

EXPECTED RESULT


SOFTWARE/OS VERSIONS
Kubuntu 25.10
KDE Plasma Version:  6.5.4
KDE Frameworks Version:  6.20.0
Qt Version:  6.9.2

ADDITIONAL INFORMATION
Comment 1 luk 2026-01-09 17:18:44 UTC
also Meta-A doesn't work - it's activity switch for me
(I have to use alt-space and in krunner I can switch activity)
Comment 2 luk 2026-01-09 17:21:22 UTC
Any shortcut I change regarding activities don't work either (doesn't matter If I put there Meta or not)
Comment 3 luk 2026-01-12 18:14:18 UTC
Today it happened again, I don't know when, I wasn't by my PC for 3h, when I returned, launcher started to behave frantically - doesn't respond to Meta anymore, searching doesn't work correctly, when I try to run an app, it freezes for some time (even it gets B&W).



ene 12 14:38:51 mpc kwin_wayland_wrapper[392894]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 14:45:56 mpc plasmashell[2986]: org.kde.pulseaudio: No object for name "alsa_output.usb-GuangZhou_FiiO_Electronics_Co._Ltd_FiiO_K7-00.pro-output-0.monitor"
ene 12 15:40:04 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:40:04 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:44:13 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:44:13 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:45:24 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:45:24 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:46:29 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:46:29 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:48:04 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:48:04 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:48:35 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:48:35 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:49:23 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:49:23 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:51:35 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:51:35 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:52:25 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:52:25 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:57:08 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 15:57:08 mpc plasmashell[2986]: file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:81: TypeError: Cannot read property 'endsWith' of undefined
ene 12 16:11:42 mpc plasmashell[2986]: org.kde.pulseaudio: No object for name "alsa_output.usb-GuangZhou_FiiO_Electronics_Co._Ltd_FiiO_K7-00.pro-output-0.monitor"
ene 12 16:15:35 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:15:35 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:17:30 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:17:30 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:21:39 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:21:39 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:25:55 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:25:55 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:30:06 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:30:06 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:33:47 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:33:47 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:38:48 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:38:48 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:43:24 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:43:24 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:48:50 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:48:50 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:54:54 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:54:54 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:58:31 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 16:58:31 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:01:50 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:01:50 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:09:12 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:09:12 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:12:25 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:12:25 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:15:24 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:15:24 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:18:41 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:18:41 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:25:45 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:25:45 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:30:14 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:30:14 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:34:39 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:34:39 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:42:43 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:42:43 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:46:13 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:46:13 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:50:33 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:50:33 mpc kwin_wayland_wrapper[455990]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/lockscreen/MediaControls.qml:31:13: QML Image: Blocked request.
ene 12 17:55:26 mpc plasmashell[2986]: org.kde.pulseaudio: No object for name "alsa_output.usb-GuangZhou_FiiO_Electronics_Co._Ltd_FiiO_K7-00.pro-output-0.monitor"
ene 12 18:08:06 mpc plasmashell[2986]: qrc:/qt/qml/plasma/applet/org/kde/plasma/kicker/ItemGridView.qml:442: TypeError: Cannot read property 'itemIndex' of null
ene 12 18:08:06 mpc plasmashell[2986]: kf.runner: Error requesting matches; calling "org.kde.runners.baloo"  : "org.freedesktop.DBus.Error.NoReply" "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."
ene 12 18:08:06 mpc plasmashell[2986]: kf.runner: Error requesting matches; calling "org.kde.runners.baloo"  : "org.freedesktop.DBus.Error.NoReply" "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."

it happened between ~15:40 and ~18:00
Comment 4 Nate Graham 2026-01-12 18:34:51 UTC
It seems like D-Bus on your system is in a fairly broken state. In this state, lots of things won't work.

Please contact the Kubuntu folks for help with it, thanks!
Comment 5 luk 2026-01-15 23:40:33 UTC
but, is it a problem with the system? or KDE ? 
it happened now again (3rd time), - in last 2-3 days.... (before never I think).

At the end I have to restart plasmashell
`systemctl --user restart plasma-plasmashell`   and everything works again.