Why is there a 3 second delay when I use controller? Mouse and keyboard also not working

Hi, and thanks for reaching out. My name is Miguel O., Sorry to hear you're experiencing this issue!

This issue is only happening on DayZ? or it is in the other games?

try to do a power cycle

Please proceed to do a power cycle to fix the issue

1. Turn off your console by holding the Xbox button  on the front of the console for approximately 10 seconds. The console will turn off.

2. Turn your console back on by pressing the Xbox button  on the console or the Xbox button  on your controller.

If you don't see the green boot-up animation when the console restarts, repeat these steps. Make sure that you hold the power button until the console completely shuts down.

Important If your console is in Sleep mode, the above steps will shut the console off completely. Sleep mode, or the ability to turn on your console by saying "Xbox on," won't be enabled until you restart the console.

If your problem persists or the problem is fixed please let me know!

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All console when using keyboard and mouse have delays, the best way to minimise it is to use a wired keyboard and mouse instead of a wireless one

For the following to work you must make the menu selections using your keyboard. If you use the controller to make your menu selections to start the game you will be placed in a room for those with a controller and your keyboard/mouse will be non functional
to make it fair to other players. To enter the room for keyboard and mouse users the game must be started by selecting the options using the keyboard/mouse. Hope this helps.

Mouse and keyboard support

Fortnite on Xbox One supports the ability to play with a mouse and keyboard. Note that when using a mouse and keyboard on Xbox One, you’ll be placed in a game with other users who also chose mouse and keyboard as their control option. To enable your setup
to use mouse and keyboard, see Mouse and Keyboard Support

Note If you’re on a child account, you’ll also need to enable settings for cross-network play to use a keyboard and mouse while playing
on Xbox One.

In order to keep an equal and fair multiplayer experience, you can only play with controllers on the Xbox One.

Games that work on the PC as well (like for example Gears of War 4) can be played with keyboard and mouse, but you can only play cooperative multiplayer with console owners that have to use controllers, so mouse and keyboard users don't have an advantage.

These XIM4 or Mayflash devices aren't real mouse and keyboard devices. These devices show themselves as a standard controller to the console, and when you move the mouse, the adaptor "guesses" from the speed you move the mouse, how hard it should push a
simulated controller stick in a certain direction.

These adaptors won't give you the same control as the mouse on a real PC.

When you stream the Xbox game screen to your PC, you can also only use a Xbox controller. Mouse and Keyboard won't work as a game input (you can only use the keyboard to enter text when the virtual keyboard is shown).

There are plans to get Keyboard and mouse working, if there ever is a way to stream the PC screen to the Xbox console.

But currently, if you're playing on the Xbox console, it's controller only (even if the controller is "guesstimated" with mouse and keyboard inputs).

The xbox has 3 usbs. 1 is used by the hard drive, 2 is used by the mouse. 3 is used by my keyboard. The keyboard has 2 usb porta one for the usb passthrough and one so it works. I got bot of them plugged in but one of them is in a charging brick
next to my xbox. It still turns off.

Take the mouse out of #2 and place the controller there, take the mouse and place in the keyboard. My controller never turns off when plugged directly to the xbox. No matter what one of the devices in your xbox must go for the controller. Make everything
else work through your pass through with the keyboard.

Problem solved.