If your Xiaomi 15 Ultra does not wake up when you tap the screen or press the Power key, the phone can feel completely unresponsive. This issue often happens after the screen turns off for a while, making it seem like the device is frozen. In most cases, the problem is related to display gestures, battery restrictions, or temporary system glitches, all of which can be fixed without advanced tools.
Why Your Xiaomi 15 Ultra Won’t Wake Up From Sleep
- Double-tap or raise-to-wake gestures are disabled.
- Battery saver or background restrictions are limiting system wake functions.
- The Power key is not responding properly.
- The system UI is temporarily frozen after sleep.
- A recent update caused minor software instability.
Make Sure Double Tap to Wake Is Enabled
Double tap to wake allows the screen to turn on without pressing the Power key. If this feature is disabled, the phone may appear unresponsive when the screen is off.
Open Settings, and then tap Lock screen.
Tap Double tap to wake, and then turn the feature on.
Enable Raise to Wake
Raise to wake uses motion sensors to turn the screen on when you pick up the phone. If it is off, the device will stay asleep unless the Power key works perfectly.
Open Settings, and then tap Lock screen.
Tap Raise to wake, and then enable the toggle.
Turn Off Battery Saver Mode
Battery saver limits background activity and sensor usage. This can interfere with wake gestures and delay screen response.
Open Settings, and then tap Battery.
Tap Battery saver, and then turn it off.
Check the Power Button Response
If the Power key is not responding, the phone may not wake from sleep at all. Testing the button helps confirm whether this is a hardware or software issue.
Open Settings, and then tap Additional settings.
Tap Button shortcuts, and then test the Power key behavior.
Restart the Phone Using a Forced Reboot
A forced reboot refreshes system services when the screen will not turn on. This is useful if the phone feels completely frozen.
Press and hold the Power key, and then keep holding it for about ten seconds.
Release the key when the Xiaomi logo appears, and let the phone reboot.
Check for System Updates
Software bugs can affect sleep and wake behavior. Installing updates often fixes these issues silently.
Open Settings, and then tap About phone.
Tap System update, and then install any available updates.
Once wake gestures and battery restrictions are properly set, the Xiaomi 15 Ultra should respond instantly when you tap or lift it. If the issue keeps returning, it may point to a Power key hardware problem that needs professional inspection.
FAQs
Why does my Xiaomi 15 Ultra wake up only after several taps?
This usually happens when double tap to wake is disabled or delayed by battery restrictions. Turning on wake gestures fixes it.
Can battery saver really stop the phone from waking up?
Yes. Battery saver can limit sensors and background services, which affects wake gestures and screen response.
What if the screen still will not wake after all fixes?
If the issue persists, the Power button or display hardware may be faulty. Visiting an authorized Xiaomi service center is recommended.
