How to connect Samsung DeX to Xiaomi TV: all ways and solutions to problems

Samsung DeX Mode turns a smartphone into a full-fledged desktop computer, but many users have difficulty connecting it to Xiaomi TVs, not only because of ecosystem differences, but also because of the image protocols. In this article, we will analyze all the current ways of connecting - from the classical to the most popular. HDMI before wireless technologies, and also tell how to avoid typical errors, for example, the lack of a signal or incorrect display.

Feature of Xiaomi TVs (series Mi) TV A2, P1, Q2 And so, what they're doing is they're focusing on their own Miracast and AirPlay protocols, whereas DeX was originally designed for the Samsung ecosystem, but with the right adapters and settings, compatibility is 90% of the time, and it's important to consider the Android version on the smartphone: Since Android 10, DeX support has become more stable, but for older models (e.g., Galaxy). S8) Workarounds may be required.

If you tried to connect and got a message "Not supported mode" or the screen was black, do not rush to blame the technique. Most often the problem is solved by choosing the right cable, updating the TV firmware or resetting the settings. HDMI-Next, we'll go through each method in detail, from the most reliable to the experimental.

1. Connection through HDMI: classical

The most universal method is to use the official Samsung adapter USB-C to HDMI (model EE-HG950) Or certified counterparts with DisplayPort Alt Mode support. It works on all Xiaomi TVs with the same name. HDMI-port, but there are nuances:

• 🔌 Cable Requirements: Adapter must support 4K@60Hz (Even if your TV isn’t like that, otherwise DeX may not start or work with artifacts.
• 📱 Compatible smartphones: Galaxy S8 Note 8 and newer, as well as all Samsung flagships with Android 9+.
• ⚡ Power: when connected to the TV smartphone will discharge faster – use USB-C charging-port.

Step-by-step:

1. Connect the USB-C → HDMI adapter to your smartphone.
2. Other end HDMI-Insert the cable into the TV port (preferably) HDMI 2.0 or ARC).
3. On the smartphone will appear notification “Connected to DeX” – tap it.
4. On the TV, select the appropriate HDMI-source (Source button on remote control).

Does your smartphone support DeX (Samsung’s list of models)

Whether an original or certified adapter is used

Is the firmware of the TV and smartphone updated?

Whether the right one is chosen HDMI-Port (try everything in turn)

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If the image does not appear:

• 🔄 Restart your smartphone and TV.
• 🔧 On Xiaomi TV, go to Settings → Display and sound → HDMI-mode and select «PC» instead of "Game console».
• 📦 Try another one. HDMI-cable (sometimes to blame cheap Chinese counterparts).

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If DeX starts but the mouse is lagging, connect the wireless mouse directly to the smartphone via Bluetooth – this will reduce latency.

2. Wireless connection via Miracast (Screen Mirroring)

Xiaomi TVs support Miracast, a wireless screen transmission standard that is theoretically compatible with DeX.

• 🚫 Restriction: DeX on Miracast works only on Android 10 smartphones+ and requires manual inclusion in the developer settings.
• 📶 Lag: Even with a stable Wi-Fi 5 GHz, the mouse/keyboard input lag can reach 100-150 ms.
• 🔒 Security: Some Xiaomi models block Miracast for third-party devices – you need to disable “Personal Data Protection” in your TV settings.

How to connect:

1. On Xiaomi TV, open Settings → Connection and Sharing → Wireless display.
2. On Samsung smartphone go to Settings → Functions → DeX → Wireless DeX.
3. Select the TV from the list of available devices.
4. Confirm the connection on both devices.

If the connection is broken:

• 🔄 Turn off Bluetooth on your smartphone – it may conflict with Miracast.
• 📡 Switch your TV and smartphone to the same 5 GHz network (not 2.4 GHz!).
• 🔧 In the settings of the smartphone developer (Settings) → The phone. → Build number – tap 7 times) turn on “Debugging over Wi-Fi».

Through HDMI-cable

On Miracast (wirelessly)

Through USB-C hub

Not at all, just heard of DeX.

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3.Use of USB-C Hub (for advanced users)

If you need to connect not only the display, but also the periphery (mouse, keyboard, external drive), USB-C Hub is the perfect solution, but not all hubs are DeX compatible, and support is required:

• 🖥️ DisplayPort Alt Mode (for video)
• 🔌 USB 3.0+ (peripheral)
• ⚡ Power Delivery (for charging a smartphone)

Recommended Hub Models:

Instructions for connection:

1. Connect the hub to the smartphone through USB-C.
2. Connect the Hub to Xiaomi TV via HDMI.
3. Connect the mouse/keyboard to USB-A hub-port.
4. On your smartphone, select DeX mode in the notification curtain.

⚠️ Attention: Hubs with a Realtek chip RTL9210 Often incompatible with DeX on Android 12+. Before buying, check the reviews of a particular model on the forums (e.g, 4PDA or XDA-Developers).

4. Alternative methods: TeamViewer and Scrcpy

If none of these things worked, you can use software solutions, which are less convenient, but sometimes they do.

• 💻 TeamViewer QuickSupport: allows you to control your smartphone from the TV TV-TeamViewer app (available in Mi) TV App Store. minus - high latency.
• 🐭 Scrcpy: Wireless screen broadcast on PC followed by TV output via PC HDMI. Requires skills to work with ADB.
• 🌐 Chrome Remote Desktop: Similar to TeamViewer, but via a browser on your TV.

Instructions for Scrcpy:

1. Install Scrcpy on PC (official website).
2. Turn on your smartphone to debug by USB (Settings → The phone. → Build Number – tap 7 times, then return to Settings → System system → For developers).
3. Connect your smartphone to your PC USB and launch Scrcpy.
4. On PC, connect the TV through HDMI and duplicate the screen.

The advantage of this method is minimal latency (20-40 ms), but it requires a constant connection to the PC. DeX will not work, but for simple tasks (view files, messengers) will do.

5. Solving Typical Errors When Connecting DeX

Even with the right connection, there can be problems, and here are the most common ways to fix them:

If none of these methods helped:

• 🔄 Reset the settings. HDMI-Port on TV: Settings → All settings → HDMI → Reset.
• 📱 Update your smartphone firmware to the latest version (especially relevant for Galaxy) S10 older).
• 🔧 Check if DeX is blocking corporate policies (on work phones).

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If the Xiaomi TV doesn’t see the smartphone on Miracast, try temporarily disabling the Smart Device Search feature in the TV’s Wi-Fi settings – it sometimes interferes with the connection.

6. Optimizing DeX for working on a Xiaomi TV

Once connected successfully, DeX may not work perfectly: slow animations, blurry text, or zoom problems.

• 🖥️ Screen resolution: In DeX settings, select 1920×1080 instead 4K — This will reduce the load and eliminate the lags.
• 🔊 Sound: If the sound is late, connect Bluetooth headphones directly to your smartphone.
• 📂 File Manager: For easy work with files, install Solid Explorer or FX File Manager – They are better adapted for DeX than standard conductor.

For gamers and designers:

• 🎮 Use Game Launcher in DeX mode to run games with mouse/keyboard support.
• 🎨 To draw, connect the graphic tablet through USB-C Hub (checked on Wacom One and Huion Kamvas).

Important: on Xiaomi TVs with MediaTek processor MT9611 (Like Mi. TV Q1 2022) There may be a color rendering bug in DeX, where greens become too saturated. Solution: Turn off Color Auto-Regulation in TV settings and set a Standard Profile».

7. Comparison with Alternatives: Should You Use DeX on Xiaomi? TV?

Before you spend time setting up DeX, is it worth it? Compare it to other solutions:

Conclusion: DeX is justified if you need:

• 📝 Fully functional office PC (for example, Microsoft Office or Google Docs).
• 💼 Multi-tasking with multiple windows (e.g., Telegram chat) + table).
• 🖱️ Mouse/keyboard support (important for programmers or designers).

If you only want movies or simple games, it’s easier to use Xiaomi’s built-in apps. TV Miracast.

FAQ: Frequent questions about DeX and Xiaomi TV