App will not load on Kubuntu 25.04, Wayland error and closes

[ssteinerx]

Installed from Flatpak via Discover app.

Syslog has this:

Error 71 (Protocol error) dispatching to Wayland display.

App exits.

[aichingm]

Oh, sorry to here that! Can you tell me a little more about your system? Like:

• the Plasma Version
• are you running a Nvidia GPU in this system?

[msalexms]

I'm experiencing the same issue on Fedora with Wayland. Here are my system details: System Information:

OS: Fedora Linux 42 (Workstation Edition) x86_64 Kernel: Linux 6.14.9-300.fc42.x86_64 Desktop Environment: GNOME 48.2 WM: Mutter (Wayland) GPU: NVIDIA GeForce RTX 2060 SUPER [Discrete]

Error Details: Gdk-Message: Error 71 (Protocol error) dispatching to Wayland display. Attempted Solutions: I've tried multiple flatpak run options including:

--socket=x11 --share=ipc --socket=wayland --socket=x11 --socket=wayland --share=ipc --env=GDK_BACKEND=x11

The last option (--env=GDK_BACKEND=x11) produces a different error: thread 'main' panicked at /run/build/lonewolf/cargo/vendor/tao-0.33.0/src/platform_impl/linux/event_loop.rs:212:53: Failed to initialize gtk backend!: BoolError { message: "Failed to initialize GTK", filename: "/run/build/lonewolf/cargo/vendor/gtk-0.18.2/src/rt.rs", function: "gtk::rt::init", line: 141 }

[ssteinerx]

I thought I'd left this a few days ago, but it seems gone:

Operating System: Kubuntu 25.04 KDE Plasma Version: 6.3.4 KDE Frameworks Version: 6.12.0 Qt Version: 6.8.3 Kernel Version: 6.14.0-15-generic (64-bit) Graphics Platform: Wayland Graphics Processor: NVIDIA GeForce RTX 3060 Manufacturer: ASUS

[aichingm]

Hi guys have you read this: https://discussion.fedoraproject.org/t/gdk-message-error-71-protocol-error-dispatching-to-wayland-display/127927/17 seems like this could help.

I know there are many issues related to Nvidia cards but I don't have one to test/debug such issues.

Please let me know if the solution from the link worked!?

Sorry for the late reply!

[Greyleox87450]

Solution from the link didn't work for me. Tried other fixes as well. Messing around at one point with the RUST_BACKTRACE=full environment actually got things open and working in one instance but I couldn't replicate it. In every other instance trying to open the app just crashes.