Samsung DeX turns off in Settings, not from the home screen

Samsung DeX is a feature that lets you connect your tablet to a monitor, keyboard, and mouse to use it like a desktop computer. If you want to stop using DeX or prevent it from launching automatically, you disable it in the Settings app rather than looking for a button on your home screen.

The process takes about a minute and works the same way on most Samsung tablets running Android 9 and newer. You do not need to uninstall anything or restart your device. Once you turn off the toggle, your tablet will no longer switch to desktop mode when you connect an external display or docking station.

Key Takeaways

  • Open Settings, then search for "DeX" or navigate to Advanced Features to find the DeX toggle.
  • Turn off the toggle next to Samsung DeX to disable the feature entirely.
  • If DeX launches when you connect a monitor, check that the toggle is actually off — it may have been turned back on by a system update.
  • Turning off DeX does not delete any files or settings; you can turn it back on anytime from the same menu.
  • Some tablets let you disable DeX only for specific connection types, like USB-C docking stations, while leaving wireless DeX active.

Finding DeX in Settings on most Samsung tablets

The fastest way is to use the search function in Settings. Open Settings, tap the search icon (usually a magnifying glass at the top), and type "DeX". The Samsung DeX toggle should appear in the results when ready.

If search does not show it, navigate manually: go to Settings > Advanced Features > Samsung DeX. On some older models, it may be under Settings > Apps > Samsung DeX instead. Once you find it, the toggle switch is right there — tap it to turn DeX off. The change takes effect when ready; you do not need to confirm or restart.

What happens when you turn off DeX

Turning off the toggle disables Samsung DeX completely. Your tablet will no longer launch the desktop interface when you connect a monitor, keyboard, or docking station. If DeX was already running, it closes when ready and returns to tablet mode.

This does not affect your tablet's normal operation. You can still use your tablet as usual in tablet mode, and all your files and apps remain untouched. If you change your mind later, you can turn DeX back on from the same Settings menu. Your tablet will remember any preferences or window layouts you had set up in DeX.

DeX keeps turning back on after you disable it

Sometimes a system update resets your DeX setting to on. If you turn it off but it comes back on after a few days or after an update, check Settings again and turn it off once more. This is normal behavior and does not indicate a problem with your tablet. Samsung occasionally resets certain features during major updates.

If DeX launches every time you connect a specific monitor or dock, even though the toggle is off, the issue may be with that accessory rather than your tablet. Try disconnecting the monitor or dock and restarting your tablet, then check the DeX setting again. If the problem persists, the dock itself may have a setting that forces DeX to set up.

Disabling DeX for only certain connection types

Some Samsung tablets let you keep DeX on overall but disable it for specific connections. For example, you might want to turn off DeX when you connect via USB-C dock but keep it available for wireless connections to a monitor.

To do this, go to Settings > Advanced Features > Samsung DeX and look for options like "USB DeX" or "Wireless DeX" listed separately. You can toggle each one independently. This is useful if you use a docking station that you want to charge from without launching DeX, but you still want DeX available when you connect a monitor wirelessly. Not all tablets offer this level of control, so check whether your model has these separate toggles.

If you cannot find the DeX setting

Older Samsung tablets or those running Android 8 or earlier may not have Samsung DeX, or it may be hidden in a different location. Check your tablet's model number and Android version in Settings > About Tablet to confirm what you are working with.

If your tablet does not have DeX at all, you do not need to disable it — the feature straightforward is not installed on that model. If you have a newer tablet and still cannot find the setting after searching, try restarting your tablet and checking Settings again. A restart sometimes makes hidden settings visible or refreshes the search index so it finds the toggle correctly.

Frequently Asked Questions

Does turning off DeX free up storage space?

No. DeX is built into Samsung tablets and cannot be uninstalled. Turning off the toggle only disables the feature; the software remains on your device. It uses no extra storage whether it is on or off.

Will turning off DeX affect my tablet's performance?

No. DeX runs only when you connect an external display or dock. Turning it off will not make your tablet faster or slower in everyday use, since it was not consuming resources while you were using tablet mode.

Can I turn off DeX just for one monitor or dock?

Not directly. Turning off DeX disables it for all connections. However, some tablets let you disable "USB DeX" or "Wireless DeX" separately, so you can turn off one type while keeping the other active. Check your Advanced Features menu for these separate toggles.

What if I need to turn DeX back on later?

Go back to Settings > Advanced Features > Samsung DeX and toggle it on. Your tablet will remember all your DeX settings and preferences. There is no setup process — it turns on when ready and is ready to use the next time you connect an external display.