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fix(daemon): drain UI channel in headless mode to prevent panic

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On PinePhone (headless display), the UI update receiver was dropped
immediately, causing sends from diag.rs to fail with SendError and
panic. Spawn a task that drains the channel until shutdown.

Fixes #657

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Deven Ducommun
2026-06-09 14:21:27 -07:00
committed by Cooper Quintin
parent 2df31300e3
commit 0a1dce3215
1 changed files with 11 additions and 3 deletions
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daemon/src/display/headless.rs
+11 -3
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@@ -7,10 +7,18 @@ use crate::config;
use crate::display::DisplayState;
pub fn update_ui(
_task_tracker: &TaskTracker,
task_tracker: &TaskTracker,
_config: &config::Config,
_shutdown_token: CancellationToken,
_ui_update_rx: Receiver<DisplayState>,
shutdown_token: CancellationToken,
mut ui_update_rx: Receiver<DisplayState>,
) {
info!("Headless mode, not spawning UI.");
task_tracker.spawn(async move {
loop {
tokio::select! {
_ = shutdown_token.cancelled() => break,
_ = ui_update_rx.recv() => {}
}
}
});
}