Indefinite hang with no notification manager

Is there an existing issue for this?

• I have searched the existing issues

Is your issue described in the documentation?

• I have read the documentation

Is your issue present in the latest beta/pre-release?

This issue is present in the latest pre-release

Describe the Bug

Summary:
Sunshine hangs indefinitely when starting game streaming or pairing a device. After a lot of trial and error, I tracked down the issue to not having a notification daemon (e.g. dunst or builtin ones in KDE/GNOME) running.

Setup:

1. A desktop environment which does not provide a notification manager by default (e.g. sway, hyprland)
2. Don't have a notification manager running; normally this would be something like dunst but my setup didn't have any

When the issue happens:

1. Start game streaming
2. Try pairing a device

Symptom:
Hangs indefinitely and if you try to interact with it, sunshine crashes.

Potential Fix:
if I start a notification manager, things start working straight away. So maybe there should either be an explicit error message provided or the sending of the notification made a optional feature so it not being successful does not hang sunshine totally.

Expected Behavior

No response

Additional Context

No response

Host Operating System

Linux

Operating System Version

Linux arch-g14 6.15.4-arch2-1 #1 SMP PREEMPT_DYNAMIC Fri, 27 Jun 2025 16:35:07 +0000 x86_64 GNU/Linux

Architecture

amd64/x86_64

Sunshine commit or version

v2025.628.4510

Package

Linux - AppImage

GPU Type

AMD

GPU Model

Radeon 6800S

GPU Driver/Mesa Version

25.1.4

Capture Method

None

Config

Apps

Relevant log output

No logs, it will just hang