[Windows] HardwareKeyboard misses next key press after alt is pressed #177822
Description
Steps to reproduce
These steps use Windows 11 with Flutter 3.35.7 (see doctor output below).
- Create a new Flutter project with
flutter create - In
main.dart, add the following inmain()afterrunApp():HardwareKeyboard.instance.addHandler((event) { if (event is KeyDownEvent) { print('Key pressed: ${event.logicalKey.debugName}'); } return false; });
- Run the project
- Try the following two things:
- Press the left alt key 4 times
- Press alt, then release alt, then press another key
Expected results
I expect an output like the following:
(for the first)
Key pressed: Alt Left
Key pressed: Alt Left
Key pressed: Alt Left
Key pressed: Alt Left
(for the second)
Key pressed: Alt Left
Key pressed: Key A
Actual results
Instead, I get the following output:
(for the first)
Key pressed: Alt Left
Key pressed: Alt Left
(for the second)
Key pressed: Alt Left
Note that this does not happen for other keys, including other modifiers like shift and control.
Code sample
Code sample
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() {
runApp(const MyApp());
HardwareKeyboard.instance.addHandler((event) {
if (event is KeyDownEvent) {
print('Key pressed: ${event.logicalKey.debugName}');
}
return false;
});
}
// Rest of file unchanged from flutter create outputFlutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.35.7, on Microsoft Windows [Version 10.0.26200.6899], locale en-US) [411ms]
• Flutter version 3.35.7 on channel stable at C:\Users\qbgee\Documents\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision adc9010625 (9 days ago), 2025-10-21 14:16:03 -0400
• Engine revision 035316565a
• Dart version 3.9.2
• DevTools version 2.48.0
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop,
enable-android, enable-ios, cli-animations, enable-lldb-debugging
[✓] Windows Version (11 Home 64-bit, 25H2, 2009) [1,943ms]
[✗] Android toolchain - develop for Android devices [161ms]
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/to/windows-android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, please use
`flutter config --android-sdk` to update to that location.
[✓] Chrome - develop for the web [118ms]
• Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe
[✓] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.14.10) [116ms]
• Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
• Visual Studio Community 2022 version 17.14.36327.8
• Windows 10 SDK version 10.0.26100.0
[!] Android Studio (not installed) [12ms]
• Android Studio not found; download from https://developer.android.com/studio/index.html
(or visit https://flutter.dev/to/windows-android-setup for detailed instructions).
[✓] VS Code (version 1.105.1) [11ms]
• VS Code at C:\Users\qbgee\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.120.0
[✓] Connected device (3 available) [194ms]
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.26200.6899]
• Chrome (web) • chrome • web-javascript • Google Chrome 141.0.7390.123
• Edge (web) • edge • web-javascript • Microsoft Edge 141.0.3537.99
[✓] Network resources [222ms]
• All expected network resources are available.
! Doctor found issues in 2 categories.