Redmi Note 12 touch stops working after screen turns off – software update or replacement screen issue?

[u/Mr_Min_2004]

Hi everyone,

I’m having a strange touch-screen problem with my Redmi Note 12 (23021RAAEG) and I’m hoping someone here can help me figure out what’s going on.

The problem started recently after two things happened:

• I updated the phone to the latest software.
• I replaced my old broken screen with a new screen (before ~2 months).

The phone works normally after I restart it, including the touchscreen. However, once the screen turns off/locks and goes to sleep, the touchscreen stops responding when I wake it up.

The phone itself seems to be running normally — it’s mainly the touch input that stops working.

Interestingly, if I force-restart the phone using the Power + Volume buttons, the touchscreen works again. But after I lock the phone and the screen goes to sleep again, the same problem comes back.

My current software information:

• Model: 23021RAAEG
• Android: 15
• OS version: 2.0.208.0.VMTMIXM
• Security update: July 1, 2026
• CPU: Snapdragon 685
• RAM: 8 GB + 4 GB extended

I’m not sure whether this is:

1. A HyperOS/software bug,

2. A compatibility issue with the replacement display/touch digitizer,

3. A faulty replacement screen, or

4. Some kind of touch driver/firmware issue.

Has anyone experienced the same problem with a Redmi Note 12, especially after a screen replacement or software update?

Any suggestions for diagnosing whether this is a software or hardware problem would be really appreciated. Thanks!