Symptoms & Diagnosis
VS Code sign-in failures usually manifest as a persistent “Signing In…” loop or an error notification stating that writing to the keychain failed. Users often notice this when trying to sync settings, use GitHub Copilot, or access remote repositories.
Identifying the root cause is the first step toward a resolution. Use the table below to diagnose your specific issue:
| Symptom | Probable Cause | System Level |
|---|---|---|
| “Writing login information to the keychain failed” | OS Keychain/Credential Manager permissions | macOS / Windows |
| Infinite “Waiting for authentication” spinner | Browser-to-App callback blocked | Network / Browser |
| Blank popup window during login | Extension conflict or GPU acceleration issue | VS Code Core |
| 403 Forbidden Error | Proxy or Firewall interference | Network |
If you see a “Sign in to use GitHub” prompt that never clears, it typically indicates that the authentication token is not being stored correctly in your local environment.
Troubleshooting Guide
1. Reset Local Credentials
Often, the local credential store becomes corrupted. You must manually clear old tokens to force a fresh authentication handshake.
On Windows, open the Credential Manager > Windows Credentials and remove entries related to vscode.github-authentication. On macOS, use Keychain Access and search for “vscode”. Delete these entries and restart the application.
2. Disable Proxy Settings
Network proxies can intercept the OAuth callback required for sign-in. Check your VS Code settings to ensure the proxy isn’t blocking the connection.
# Open settings.json and check for these lines
"http.proxy": "",
"http.proxySupport": "off"
3. Use the Device Code Flow
If the standard browser redirection fails, you can try forcing VS Code to use a device code. This allows you to enter a code manually on the GitHub website.
Open the Command Palette (Ctrl+Shift+P) and search for “GitHub: Sign Out”. After signing out, try signing in again. If prompted, look for an option to “Use a different sign-in method.”
4. Check Extension Conflicts
Certain security or network extensions can interfere with the authentication provider. Run VS Code without extensions to verify if a plugin is the culprit.
code --disable-extensions
If sign-in works in this mode, re-enable your extensions one by one to find the problematic one.
Prevention
To prevent future VS Code sign-in issues, ensure that your installation is always up to date. Microsoft frequently releases patches for authentication providers.
Regularly audit your OS-level permissions. For Linux users, ensure you have a secret storage service like gnome-keyring or kwallet installed and configured properly, as VS Code relies on these for secure token storage.
Finally, avoid using multiple GitHub accounts within the same VS Code profile unless you are using the official “Profiles” feature, as this can lead to token overwriting and frequent logouts.