No Auto-Pause

Openplanet plugin that keeps Trackmania Turbo running when the window loses focus.

Without it, alt-tab (or any other window stealing focus) pauses the race, pops the attract / INSERT COIN path, and freezes rules.Now — including Openplanet Update(). Toggle from Plugins › No Auto-Pause or the Keep running when unfocused setting. Unload restores the original bytes.

Turbo-only. On other games it loads, warns, and does nothing.

License: public domain (Unlicense or CC0 1.0, at your option).

Authors: XertroV

Code/issues: https://github.com/clankercode/tm-no-auto-pause

Install

Needs Openplanet on Trackmania Turbo.

1. Grab the source (or a release .op when one exists).
2. Dev copy: ./build.sh dev stages into ~/OpenplanetTurbo/Plugins/tm-no-auto-pause and reloads over RemoteBuild :30002.
3. Or copy src/* plus info.toml into Documents/TrackmaniaTurbo/OpenplanetTurbo/Plugins/tm-no-auto-pause/.

Reload plugins from the Openplanet menu, or restart the game.

Log

Transition only (not per frame), Openplanet.log:

No Auto-Pause: focus lost paused=no Now=1044941 dNow=+12486
No Auto-Pause: pause started focus=no Now=1032155

• focus — engine window-has-focus flag (Turbo has no InputPort.IsFocused)
• pause — cmd-buffer paused, or rules.Now stalled ~20 frames in a race
• dNow — race-clock delta since the previous focus log

How it works

Turbo's WndProc writes unfocused flags; WinMain then SleepEx's and App_NotifyWindowFocus(0) pauses the app. This plugin patches those sites at load. Details: Openplanet research note turbo/2026-09-08-Turbo-Unfocus-Pause.md (sibling openplanet/research repo).

v0.1.3: the WM_SIZE IsIconic stub now pops the HWND (stdcall). v0.1.1–0.1.2 left it on the stack and crashed on resize.

Build

./build.sh dev       # stage + RemoteBuild reload (OpenplanetTurbo :30002)
./build.sh release   # tm-no-auto-pause-<version>.op

SKIP_LSP=1 / SKIP_RELOAD=1 if needed. TURBO_PLUGINS_DIR overrides the stage path.