[Bug] Clipboard unavailable on Wayland (Flatpak): arboard falls back to X11 which is unreachable

[jvik]

Before submitting

• I have attached my logs below (Terminal + Console), or explained why I cannot get them.
• I searched the existing issues and this is not a duplicate.
• I included concrete steps to reproduce.

Platform

Linux

Description

Copy link (share-qobuz) silently fails on Wayland when running the Flatpak build. The clipboard write always fails with a logged warning and nothing ends up on the clipboard.

Steps to reproduce

1. Install qbz via Flatpak on a Wayland compositor (Sway, GNOME, KDE Wayland, etc.)
2. Right-click any track → share / copy Qobuz link
3. Attempt to paste — clipboard is empty

Expected behavior

Copy link writes the Qobuz share URL to the Wayland clipboard, which can then be pasted in any Wayland app.

Actual behavior

The clipboard write fails silently. Nothing is placed on the clipboard.

QBZ version

2.0.2

Installation method

Flatpak

Distribution

Fedora Linux, kernel 7.0.0-28

Desktop environment / WM

Sway

Display server

Wayland

GPU

Intel Iris Xe Graphics (ADL GT2)

Audio backend

PipeWire

Audio device / DAC

iFi HD USB Audio, Jabra Link 380, Bose NC 700 Headphones (Bluetooth)

Logs

https://paste.rs/NWCYW

Terminal log captured via flatpak run --env=RUST_LOG=qbz=debug com.blitzfc.qbz:

INFO  qbz [qbz-slint] media-action: kind=track id=404558504 action=share-qobuz
INFO  qbz [qbz-slint] copied Qobuz link for track 404558504
WARN  qbz::share [qbz-slint] clipboard unavailable: Unknown error while interacting with the clipboard: X11 server connection timed out because it was unreachable

Root cause analysis

Inside the Flatpak sandbox, only WAYLAND_DISPLAY is set — DISPLAY is absent:

WAYLAND_DISPLAY=wayland-1

The clipboard backend (arboard, used via Slint) is not compiled with Wayland clipboard support (wl-clipboard feature). It therefore attempts an X11 connection, which times out because the X11 socket is not exposed when a Wayland session is active (fallback-x11 Flatpak permission is a no-op when WAYLAND_DISPLAY is present).

Attempted workarounds (none resolved it):

• flatpak override --user --talk-name=org.freedesktop.portal.Desktop
• flatpak override --user --unset-env=DISPLAY --nosocket=fallback-x11
• flatpak override --user --socket=x11 (unconditional X11 — XWayland is running at :0, but DISPLAY is still not injected by Flatpak when Wayland is present)