Step by step
Open Developer options
Enable Developer options if needed, then open it in Android Settings. The menu location varies by manufacturer.
Disable the restriction
Find Restrict child processes and turn it OFF. Return to DroidDeck after changing it.
Use the in-app fallback if needed
If Android does not expose the toggle, select Fix it for me in DroidDeck and follow its wireless debugging and pairing instructions.
Try the Steam session again
Return to DroidDeck and press Play. If the session still closes, check runtime readiness, your GPU, and the network, then collect Share logs for support.
Why this setting matters
DroidDeck starts a Linux runtime and several processes to run the Steam session. Android's child-process restriction can interrupt that session. A quick return to the launcher, sometimes without a useful visible error, makes this one of the first settings to check.
A similar symptom can have other causes. If this setting is already off, continue with the startup troubleshooting guide rather than repeatedly reinstalling the app.
When the toggle is missing
Many Android 12/13 devices do not show Restrict child processes in Developer options. The app's Fix it for me flow uses wireless ADB pairing to apply the setting. Follow its pairing screen rather than using unrelated APKs or scripts.
The pairing address and connection address can use different ports. Enter the values displayed by Android into the corresponding fields in DroidDeck.
Check again after system changes
If Steam starts failing after an Android update or a settings reset, check the restriction again. Manufacturer menus differ, so use Settings search or the device maker's instructions to find Developer options.