Kubuntu 24.04 under X11 App does not start

[bytelftr]

Version/Branch:

1.2.4

Operating system:

Kubuntu 24.04

Debug probe:

ST-Link-V2

Microcontroller:

STM32F103CBT6

Details:

On Kubuntu 24.04 under X11 application does not start

Under Wayland there is no issue. Here is short dump from console: (I copied runtime to desktop, in default location there is same issue)

$: ./MCUViewer -d
[2025-12-15 09:17:54.653] [logger] [info] Working directory set to: /home/username/Desktop/MCUViewer
[2025-12-15 09:17:54.653] [logger] [info] Starting MCUViewer!
[2025-12-15 09:17:54.653] [logger] [info] Version: 1.2.4
[2025-12-15 09:17:54.653] [logger] [info] Commit hash 7a22eaad554df58cef4d58936b29c2ac9464e024
[2025-12-15 09:17:54.664] [logger] [info] Supported recorder version: 8
[2025-12-15 09:17:54.727] [logger] [info] GDB executable working!
[2025-12-15 09:17:54.727] [logger] [debug] Variable table window created!
[2025-12-15 09:17:54.727] [logger] [info] Loading global config /home/username/.config/MCUViewer/config.cfg
[2025-12-15 09:17:54.729] [logger] [info] JLink DLL Version: 8.16
GLFW Error 65544: Wayland: Failed to connect to display
[2025-12-15 09:17:54.908] [logger] [info] No updates available
MCUViewer: ./src/window.c:681: glfwGetWindowContentScale: Warunek zapewnienia `window != NULL' nie został spełniony.
Failed to open crash log file

Screenshots/Video:

No response

[klonyyy]

Hello, are you trying to run it using ssh?

[bytelftr]

Hello, no, I'm running it native. Under Wayland it works, under X11 does not. On Debian 13 it works without any problems under X11 and Wayland, so it is very odd.

Maybe there is something in system configuration/libraries?

[klonyyy]

Hmm, honestly I haven't heard about a similar issue before - maybe it's linked to your specific setup? I won't be able to test it on Kubuntu right now, but we can see if more Kubuntu users are affected.