I had been curious about how to enable the wayland option for my older KDE Plasma install, thinking I’d like to have the option to try wayland one day. After reading the Did Manjaro KDE switched to Wayland? post I concluded this “new” package was my missing link and proceeded to install plasma-wayland-session, which also prompted to install xorg-wayland as well, and afterwards was prompted to reboot.
Post reboot, I saw the bottom/left selector and confirmed I could see both options (X11 and wayland), and so I thought I’d give the wayland option a go; curiosity killed the cat. After clicking around a bit, I decided to log out and switch back to X11.
After logging back in I noticed my wallpaper was wrong… defaulting to newer blue/orange image. I thought I’d run journalctl to see if anything was posted there… and found that I have a problem with xdg-desktop-portal-kde:
$ journalctl --priority err --boot 0
Jun 09 01:17:00 AM4-5600X-Linux xdg-desktop-portal-kde[12690]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
Jun 09 01:17:00 AM4-5600X-Linux systemd-coredump[12694]: [🡕] Process 12690 (xdg-desktop-por) of user 1000 dumped core.
Module linux-vdso.so.1 with build-id a6913678db0cce9811d35c782542decae1d16452
Module libuuid.so.1 with build-id 032a21acd159ee3902605e9911be5f86a7df7df9
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Module libKF5KIOGui.so.5 with build-id c49f2e1aecdea0eb7735bbd3e149bf70adf70f0f
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Module libQt5TextToSpeech.so.5 with build-id e5a59ae504c2f3b55b8c881e148a9f4ee5361273
Module libcanberra.so.0 with build-id 8ddef69c9b84a86062c88a59510639cd908fc6d3
Module libc.so.6 with build-id 388993b6ef62f964bc7bf473c069fbfe957b9e44
Module libstdc++.so.6 with build-id b3eaebcb5369487562e52dd8d016c9cd77f80c54
Module libQt5Core.so.5 with build-id c38b617c7f758f3327a3cf4d1b4168ec8e4db842
Module libQt5DBus.so.5 with build-id 9095840053834c1683ba54020b63d7e545cd0f47
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Module libKF5ConfigCore.so.5 with build-id 834d1bd13d3bbac5fd141fa08b79d19e7727674d
Module libKF5Service.so.5 with build-id 12d2ed6e76be6a13381da83759510bf3a6f725ac
Module libKF5KIOCore.so.5 with build-id 1a92d633d7ee99315c9ee76b901f05341b7e8663
Module libQt5Qml.so.5 with build-id 3302afd50e5fb5cc942267e9cad5746e4c125ce1
Module libQt5Gui.so.5 with build-id f2aced11623934e05c00514f8e891a65700fca20
Module libQt5Quick.so.5 with build-id e64c8602e59b921835da1ffa74aa5a3bfa52a296
Module libQt5Widgets.so.5 with build-id 4718220524507280b1711f967e97d6017eaa0d6c
Module libKF5ConfigGui.so.5 with build-id 1c964c60eba88258e448acd062029a683c48baf1
Module libKF5ItemViews.so.5 with build-id fab874f5c8eb4f8c4696851adb78f9acf5997886
Module libQt5PrintSupport.so.5 with build-id f5959ede65b8a22c8802181e3e198fa0749c5114
Module libKF5WindowSystem.so.5 with build-id b4733339e1c479aa3aeaf0b6a6335509b39f7c61
Module libKF5KIOWidgets.so.5 with build-id 36ea01fdfefbeaafe56c011cddce2c186924a28a
Module libKF5KIOFileWidgets.so.5 with build-id 399b54ad854db4f1bcff07c269987cab2d9ea33e
Module libwayland-client.so.0 with build-id 95e7368b400dd57e3db2a5c385de71c7dca08879
Module libKF5WaylandClient.so.5 with build-id 1bd92bc82300211faf1ee4642e2c0ee624cdf0b5
Module libKF5Notifications.so.5 with build-id 9346ac445cfb2db35e59320ec9478439078dcd3f
Module xdg-desktop-portal-kde with build-id c8fd597d9a48083ded6bd16ca0eb809770a8e63a
Stack trace of thread 12690:
#0 0x00007fcdfb8d636c n/a (libc.so.6 + 0x8e36c)
#1 0x00007fcdfb886838 raise (libc.so.6 + 0x3e838)
#2 0x00007fcdfb870535 abort (libc.so.6 + 0x28535)
#3 0x00007fcdfbd2bedc _ZNK14QMessageLogger5fatalEPKcz (libQt5Core.so.5 + 0x9fedc)
#4 0x00007fcdfcaaa925 _ZN22QGuiApplicationPrivate25createPlatformIntegrationEv (libQt5Gui.so.5 + 0x13c925)
#5 0x00007fcdfcaaaf99 _ZN22QGuiApplicationPrivate21createEventDispatcherEv (libQt5Gui.so.5 + 0x13cf99)
#6 0x00007fcdfbf1f5eb _ZN23QCoreApplicationPrivate4initEv (libQt5Core.so.5 + 0x2935eb)
#7 0x00007fcdfcaab049 _ZN22QGuiApplicationPrivate4initEv (libQt5Gui.so.5 + 0x13d049)
#8 0x00007fcdfd684d6e _ZN19QApplicationPrivate4initEv (libQt5Widgets.so.5 + 0x175d6e)
#9 0x000055c00bafe0d1 n/a (xdg-desktop-portal-kde + 0x1d0d1)
#10 0x00007fcdfb871290 n/a (libc.so.6 + 0x29290)
#11 0x00007fcdfb87134a __libc_start_main (libc.so.6 + 0x2934a)
#12 0x000055c00baff545 n/a (xdg-desktop-portal-kde + 0x1e545)
ELF object binary architecture: AMD x86-64
Jun 09 01:17:00 AM4-5600X-Linux systemd[1196]: Failed to start Xdg Desktop Portal For KDE.
How do I fix this problem properly? I don’t want to make any more assumptions that might make things worse.
Might I have lost more than just my wallpaper settings? If so, might my daily Back In Time of my home folder come in handy?
EDIT: I figured a reboot wouldn’t make things worse and gave that a go. Post reboot journalctl --priority err --boot 0 is clean, so the errors did not repeat.
I’d still appreciate a hand understanding what happened, how I can avoid this issue going forward, how/what I may need to recovery beyond my wallpaper, what (if anything) I should uninstall, etc…
EDIT 2: Post reboot, I got curious and thought I’d confirm the logs were clear of anything else prior or leading up to my reboot… and found what I assume to be further errors created during the reboot process:
$ journalctl --priority err --boot -1
Jun 09 01:45:23 AM4-5600X-Linux systemd-logind[863]: Failed to start autovt@tty2.service: Transaction for getty@tty2.service/start is destructive (reboot.target has 'start' job queued, but 'stop' is included in transaction).
Jun 09 01:45:23 AM4-5600X-Linux systemd-coredump[114400]: Failed to connect to coredump service: Connection refused
Jun 09 01:45:23 AM4-5600X-Linux kded5[114399]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
Jun 09 01:45:23 AM4-5600X-Linux systemd-coredump[114402]: Failed to connect to coredump service: Connection refused