morpheus-gui segfault on Ubuntu 26.04 LTS 'Resolute Raccoon' (Wayland)

[Thomas Carre]

Hello,

I am trying to run Morpheus 2.4.1 on Ubuntu 26.04 LTS (Resolute Raccoon, x86_64, Wayland session) using the official .deb package provided on the download page.

Both morpheus-gui and the CLI crash immediately with a segmentation fault:

  QSocketNotifier: Can only be used with threads started with QThread
  Must construct a QGuiApplication first.
  QObject::connect: Cannot connect (nullptr)::cursorRectangleChanged() to QIBusPlatformInputContext::cursorRectChanged()
  Segmentation fault (core dumped)

I have tried the following without success:
  - QT_QPA_PLATFORM=xcb and QT_QPA_PLATFORM=wayland
  - GTK_IM_MODULE='' QT_IM_MODULE='' XMODIFIERS='' (to bypass IBus)
  - IBUS_USE_PORTAL=1
  - WAYLAND_DISPLAY="" DISPLAY=:0
  - Running as root

ldd shows no missing libraries. XWayland is available and responding on :0.

Has anyone encountered this issue on Ubuntu 26.04? Any help would be greatly appreciated.

Thank you.

[Jörn Starruß]

Dear Thomas Carre,

thanks for notifying us about the issue. We identified the problem to be a packaging issue, which is not fully understood yet.

I published a fresh package that we have tested and expect  to work properly also on your side.
  -  https://morpheus.gitlab.io/download/2.4.1/#linux

Best,
Jörn
(Morpheus team)

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Dipl.-Ing. Jörn Starruß

Technische Universität Dresden
CIDS - Center for Interdisciplinary Digital Sciences
Department Informationsdienste und Hochleistungsrechnen (ZIH)
Abteilung Innovative Methoden des Computing

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