Hello!

I just ran a system update, and since then I haven't been able to start a niri/noctalia session.
I can complete the boot process and log in, but then I just get a gray screen and can only move my mouse around on it. 🙂
Noctalia (when started via TTY) says that the connection to a Wayland display has failed.

I checked the Pacman log, and that’s probably where the problem lies. However, I’m not entirely sure how to fix it or exactly which package I might need to reinstall or reconfigure.

Thanks so much for any help! 🙂

Here’s the relevant log output. I hope that’s enough to track down the error?

`[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Enabling dinit service
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] dinitctl: connecting to socket: /run/dinitctl: No such file or directory
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Qt depends on a UTF-8 locale, but has failed to switch to one.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] If this causes problems, reconfigure your locale. See the locale(1) manual
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] for more information.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] error: XDG_RUNTIME_DIR is invalid or not set in the environment.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Failed to create wl_display (No such file or directory)
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Authorization required, but no authorization protocol specified
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] 
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.xcb: could not connect to display :0
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] 
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Available platform plugins are: eglfs, linuxfb, minimalegl, minimal, offscreen, vkkhrdisplay, vnc, wayland-brcm, wayland-egl, wayland, xcb.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] 
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] /tmp/alpm_pLAVdS/.INSTALL: line 5:  4662 Aborted                    kdialog --warningyesno "With this update, your system will move to Dinit as init system.<br>
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET]         To see the the reasons for moving away from systemd see:<br>
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET]         https://kaosx.us/news/2026/systemd_kaos/.<br><br>
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET]         Greetd replaces sddm too, make sure to use <strong>F3 to select the proper session.</strong><br><br>
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET]         Do you want to save this output?"
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Qt depends on a UTF-8 locale, but has failed to switch to one.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] If this causes problems, reconfigure your locale. See the locale(1) manual
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] for more information.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] error: XDG_RUNTIME_DIR is invalid or not set in the environment.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Failed to create wl_display (No such file or directory)
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Authorization required, but no authorization protocol specified
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] 
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.xcb: could not connect to display :0
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] 
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] Available platform plugins are: eglfs, linuxfb, minimalegl, minimal, offscreen, vkkhrdisplay, vnc, wayland-brcm, wayland-egl, wayland, xcb.
[2026-06-24T18:29:04+0200] [ALPM-SCRIPTLET] `