I changed the screen of my Samsung S22 Ultra a few months ago because I had cracked it. Since then, it has worked perfectly. It’s an original screen, directly from Samsung’s official repair service — not a generic or counterfeit part. After this replacement, I performed several updates, including updates under Android 14, and everything continued to work just fine.
However, this morning, I updated my phone to Android 15 with One UI 7. For about an hour after the installation, everything seemed to work normally. But then I noticed a very strange problem: when I lock my phone (just pressing the lock button without turning it off completely), and then try to unlock it again by pressing the same button, the screen stays black.
Important: the phone remains on! I know this because if I double-click the button (which I’ve set to turn the flashlight on/off), the phone responds. Also, when I place my finger on the fingerprint sensor, I can hear the unlocking sound — so the phone is indeed unlocking, but the screen stubbornly stays black.
After 5 to 10 seconds, without me doing anything else, the device reboots by itself. And this problem keeps repeating in a loop every time I lock the screen and try to unlock it.
I have already followed all the troubleshooting steps that were suggested:
I wiped the cache partition using recovery mode.
I tested the phone in Safe Mode to check if a third-party app was causing the issue, but even in Safe Mode, the bug persists.
I checked for any additional updates after Android 15, but the system says it’s up to date.
As a last resort, I even performed a full factory reset after backing up all my data — but despite this, the problem remains exactly the same.
