[Feedback]: Main window never becomes visible until the app is launched a second time — ready-to-show does not fire while the window is hidden

Commencez par reproduire le lancement Windows packagé décrit dans l’issue et inspectez out/main/index.js, en particulier la configuration de la fenêtre masquée ainsi que les handlers ready-to-show, second-instance, deep-link et notification-click. Vérifiez comment se comporte la visibilité avant le premier paint, notamment le throttling en arrière-plan et le GPU fallback signalé. Le travail est terminé lorsque le premier lancement affiche de manière fiable la fenêtre principale sans nécessiter de seconde instance et évite un flash noir inexpliqué.

What problem are you trying to solve?

Summary

After installing, the first launch appears to do nothing: no window, no taskbar entry, no error — for as long as you wait. Launching the app a second time brings the window up in under half a second. This happens on every launch, so the app can only be opened by launching it twice.

Environment

• Command Code Desktop 0.1.31 (packaged)
• Installer CommandCode-0.1.31-x64-setup.exe, size 145234320, sha512 Kap6h9HtsAdGCqAsGiCo/gddarFzRbdUn+l1a7Gov0gjYyHHb35t3aM362xR9wxNpSuWOWDzfY+pQpp9G33LIA==
• Windows 11 (Windows PowerShell 5.1.26100.9482)
• Display 1600x900 @ scale 1.2
• GPU vendor 4318 / device 8580, driver 32.0.16.1692

Steps to reproduce

1. Quit Command Code completely.
2. Launch Command Code.exe once.
3. Do not touch anything — just watch the screen.

Expected

The window appears within a couple of seconds.

Actual

No window appears. Verified with a 60-second instrumented watch (user32 EnumWindows polled every 100ms): no window was ever reported visible. Launching a second instance at t+60s made the main window visible at t+60.89s — 0.44s later.

Evidence

Window-visibility timeline alongside main.log:

t+0.00s   launched Command Code.exe (pid 16228)
t+0.69s   main.log: Command Code starting - v0.1.31 (packaged: true)
t+0.83s   main.log: [startup] ... main.harness-loaded +44ms (837ms)     <- window created, hidden
t+60.21s  *** launched a 2nd instance ***
t+60.29s  PROC+ pid=9736 (2nd main process)
t+60.89s  WIN+ MAIN APP WINDOW FIRST BECAME VISIBLE
          hwnd=2164394 class=Chrome_WidgetWin_1 size=1741x1042 title=[Command Code]
t+61.45s  main.log: [startup] ... main.ready-to-show +59988ms (60825ms)

Two observations:

1. ready-to-show fired at +59988ms, i.e. at the moment the second instance arrived — not when the renderer finished a fixed amount of work. Across 5 launches the value tracked only how long the user waited (22012ms, 25038ms, 27024ms, 27930ms, 59988ms).

2. Chromium's own log places the second instance immediately before it:

[16952:0917/175428.395:VERBOSE1:chrome\browser\process_singleton_win.cc:114]
Handling STARTUP request from another process

28ms later ready-to-show fired; 130ms after that the window became visible.

Root cause

out/main/index.js — the window is created hidden with a black background:

backgroundColor: "#000000",
show: false,

and is only ever revealed from the ready-to-show handler:

win.on("ready-to-show", () => {
  ...
  if (!win.isDestroyed()) win.show();
});

The only other callers of win.show() are the second-instance, deep-link and notification-click handlers:

app.on("second-instance", (_event, argv) => {
  ...
  const win = pickWindowToReveal(mainWindow, appWindows);
  if (!win) { createWindow(); return; }
  if (win.isMinimized()) win.restore();
  win.show();
  win.focus();
});

So visibility depends on ready-to-show firing for a window that is not yet visible. On this machine it never does while hidden, so the window is never shown — until a second instance calls win.show(), at which point the first paint finally happens and ready-to-show fires.

I can't prove from outside the app why the hidden window's first paint is deferred. Worth checking: hidden-window rendering throttling (webPreferences.backgroundThrottling is left at default), and a GPU/compositor problem — the run log shows Chromium later relaunching the GPU process in software mode (--disable-gpu-sandbox --use-gl=disabled).

This also explains the "black window flashes for a moment" that users report: backgroundColor: "#000000" means the window is shown as a solid black rectangle before the UI paints.

What would improve it?

Suggested fix

Do not make the first paint a hard precondition for visibility. A fallback timer is sufficient:

const reveal = () => {
  if (!win.isDestroyed() && !win.isVisible()) win.show();
};
win.once("ready-to-show", reveal);
setTimeout(reveal, 3000);

Also worth considering webPreferences: { backgroundThrottling: false }, and reconsidering the show: false + "#000000" combination — if the window is shown early by any path it renders as a black rectangle, which is what users are seeing.

What do you do today?

No response

Product area

None