Why the screen on the Xiaomi phone hangs: a full analysis of the causes and solutions

You have your own Xiaomi Redmi Note 12 or POCO X5 Pro, and the screen suddenly starts to slow down, freezes for a few seconds, doesn't respond to touch, animations twitch like a slideshow. Is the situation familiar? Screen hanging is one of the most common problems with Xiaomi smartphones, and the reasons can lie in software failures and hardware malfunctions. In this article, we will not only list the possible culprits of lags, but also show how to diagnose the problem in 5 minutes and fix it without contacting the service center.

It's important to understand that screen hangings rarely happen "just like that." Most often it's a chain reaction: overheating. → processor-trottling → slowing of the interface, or cache → lack of memory → «We'll look at 10 key reasons, including those that are not mentioned in forums (for example, driver conflict after an update). MIUI Or a defect in the display controller, and for older models like the Redmi. 4X or Mi A1 Add a separate section with solutions for “obsolete” iron.

1. CPU overheating: why Xiaomi starts to "brake" when loaded

If the screen hangs coincide with the moments of active use - games, video shooting 4K, charging or even prolonged use of the navigator - the culprit with a 90% probability is the trottling of the processor due to overheating. 6xx Mediatek Helio is known for its tendency to overheat due to the:

• 🔥 Bad thermal paste between chipset and radiator (relevant to the POCO F3 redmi K40).
• 📱 Dust-clogged air vents (if any, like Black Shark’s).
• 🔋 Fast charging with higher power 33W (Heats the battery that shares heat with the processor).
• 🎮 A game mode that overclocks GPU to the limiting frequencies without proper cooling.

How do you check? Install the app. AIDA64 or CPU Monitor and look at the temperature of the processor at the time of lag. If the values are greater than 65-70°C, trottling is activated, and the system is forced to reduce performance to avoid chip damage. MIUI begins to “stutter”, animations slow down, and the screen can freeze for 3-5 seconds.

⚠️ Note: If the processor temperature rises above 80°C normal (no games), this is critical! Turn off the phone immediately and let it cool. Further use could cause the chip to detach from the board.

Lack of RAM: why the screen is “freezing” when switching applications

Xiaomi models with 3-4 GB of RAM (Redmi) 9A, POCO M3) They suffer from chronic memory deficits. MIUI It aggressively kills background processes, but when memory is not enough even for current tasks, it starts to hang:

• 📱 The screen freezes for 2-3 seconds when returning to the main screen.
• 🔄 Apps are rebooted instead of rebooted (e.g. YouTube or Telegram).
• 🎵 Music or video starts to jump when multitasking.

Check the use of RAM in Settings → The phone. → Memory status: If it's less than 500MB free, it's at its limit:

Critical information: On some models (for example, Redmi Note 8 Pro) a bug with memory leakage in the computer MIUI 12.5 led to a complete lockdown of the screen. MIUI 12.0.3 or upgrade to MIUI 13.

3.Clogged cache and junk files: The hidden cause of lags

System system MIUI It is known for actively cacheing data to speed up work, but over time this cache turns into “junk” that slows down the phone, especially for models with 32-64 GB of memory (Redmi). 7A, Mi 8 Lite, where the vacant space ends quickly:

• 🗑️ The screen hangs when opening a gallery or camera.
• 📁 Applications take a long time to load, even if they were opened quickly before.
• 🔍 Search in settings works with a delay.

How to clean the cache correctly:

1. Go to Settings. → Warehouse → Clean and run a deep cleaning.
2. For individual applications: Settings → Annexes → Select an application → Warehouse → Clear the cache.
3. Delete unnecessary files via Files by Google or MIUI Cleaner.
4. If the phone is still slowing down, try resetting the cache settings through Settings. → Additionally. → Resetting settings → Reset application settings.

⚠️ Warning: Don’t use “optimizers” like Clean Master or CCleaner – they often delete important system files and aggravate the lags. MIUI.

4. Post-update conflicts MIUI: Why does the screen slow down after the update?

Updates MIUI They often bring not only new features, but also bugs. MIUI 14 users of Redmi Note 10 Pro massively complained about the screen hanging because of:

• 🔄 Conflict of new animations with old display drivers.
• 📱 Unoptimized background processes (e.g. miui.analytics).
• 🔋 Bugs in power management (processor does not reduce frequency when downtime).

How to diagnose the problem:

1. Check the version. MIUI In Settings → If it's a recent update (released) ≤ 2 weeks ago, there is a good chance that the bug is already known.
2. Read the reviews on the forums 4PDA or XDA Developers – often publish temporary fixes there.
3. Try to roll back to the previous version via Fastboot (instruction below).

If the rollback didn't help, try resetting (but do a backup first!) for this:

1. Go to Settings → Additional → Resetting settings.
2. Select Reset all settings (does not delete files, but resets system settings).
3. If it doesn’t help, do a full reset (delete all data!).

5. Hardware malfunctions: when the "iron" is to blame

If the software methods didn't work, the problem could be the hardware, and here are the most common malfunctions.

It is difficult to diagnose hardware problems on your own, but there are several tests:

• 🔧 Sensor Test: Go to Settings → The phone. → All specifications → Sensor test (some models may have different paths) If the screen doesn't respond to touch or reacts with a delay, it's the digitizer's fault.
• 🔋 Battery test: Use AccuBattery to check battery status, and if the capacity has dropped below 70% of its nominal capacity, it's time to change it.
• 📡 Antenna Test: Hanging on calls or mobile internet may indicate problems with the modem. Check the signal in Settings → SIM-maps and mobile networks → Network signal.

⚠️ Warning: If the phone fell or got wet, do not try to disassemble it yourself! Xiaomi uses glue to fix the battery and plumes - a careless opening can damage the fee.

6. Viruses and malware: a hidden threat

It's unlikely, but it's possible: some viruses (like AdLoad or HiddenAds) masquerade as system processes and load the processor, causing a hangover.

• 📱 The phone is slowing down even after resetting the settings.
• 🔋 The battery goes down in 3-4 hours without active use.
• 📊 B Settings → The battery can see unknown processes (e.g. com.android.system.update).
• 📢 Advertisements appear in the status line or on top of applications.

How to check and remove viruses:

1. Install Malwarebytes or Dr.Web Light and perform a deep scan.
2. Check the list of installed applications in Settings → Remove suspicious apps (especially with names like System Update, Flash Player or Cleaner Pro).
3. If the virus is embedded in system files, only a complete flashing through Fastboot will help.

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Before installing the antivirus, disable Google Play Protect in the Google Play settings – it often blocks legitimate tools like Magisk or Google Play. ADB.

7. Features of old models: why the Redmi brakes 4X, Mi A1 others

If you have Xiaomi older than 2018 (Redmi 5, Mi 6, POCO F1), screens are often associated with:

• 📱 An outdated version of Android (e.g. Android 7.1 on Redmi Note 4 does not support modern apps).
• 🔋 Degraded battery (after 500 charging cycles, the capacity drops by 30-40%).
• 🎯 Lack of eMMC memory (cheap memory on older models slows down when filled by more than 80%).

Solutions for old smartphones:

On models with a Snapdragon 625 processor (for example, Redmi Note) 4X) post-update MIUI 12+ There's a frequent frieze bug because of the kernel conflict and the new drivers. MIUI 11 or custom core installation.

8. Wrong settings: What you might have missed

Sometimes the screen hangs because of seemingly harmless settings.

• 🔄 Developer Mode: If the option is not turned off the screen or GPU-acceleration, it can cause lags. Turn them off in Settings. → Additionally. → For developers.
• 📡 Double Space: The Second Space Function MIUI It creates a second profile that can conflict with the main one.
• 🎵 Sound effects: Widgets like Mi Sound Enhancer or Dolby Atmos load the processor. Turn them off in Settings. → Sound.
• 🔋 Performance mode: C Settings → Battery → Select Balanced Mode over High Performance.

It is also worth checking the display settings:

1. Go to Settings → Display.
2. Turn off Automatic Brightness (sometimes the light sensor glimpses and causes lags).
3. Set the screen refresh rate on 60 Hz (if worth it) 90/120 Hz – this increases the load on the processor).

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In the models with AMOLED-screens (e.g. Xiaomi 12) enable mode DC Dimming (in Settings) → Display) may reduce flickering, but will increase the load on GPU and cause a hang-up.

FAQ: Frequent questions about screen hangings on Xiaomi