Add a FAQ section for Wayland support

The video driver might need to be explicitly set to wayland.

Refs #2554 <https://github.com/Genymobile/scrcpy/issues/2554>
Refs #2559 <https://github.com/Genymobile/scrcpy/issues/2559>

FAQ.md

@@ -153,6 +153,26 @@ You may also need to configure the [scaling behavior]:
 [scaling behavior]: https://github.com/Genymobile/scrcpy/issues/40#issuecomment-424466723
 
 
+### Issue with Wayland
+
+By default, SDL uses x11 on Linux. The [video driver] can be changed via the
+`SDL_VIDEODRIVER` environment variable:
+
+[video driver]: https://wiki.libsdl.org/FAQUsingSDL#how_do_i_choose_a_specific_video_driver
+
+```bash
+export SDL_VIDEODRIVER=wayland
+scrcpy
+```
+
+On some distributions (at least Fedora), the package `libdecor` must be
+installed manually.
+
+See issues [#2554] and [#2559].
+
+[#2554]: https://github.com/Genymobile/scrcpy/issues/2554
+[#2559]: https://github.com/Genymobile/scrcpy/issues/2559
+
 
 ### KWin compositor crashes
 

README.md

@@ -328,30 +328,18 @@ For example, you could capture the video within [OBS].
 _Scrcpy_ uses `adb` to communicate with the device, and `adb` can [connect] to a
 device over TCP/IP:
 
-1. Plug the device into a USB port on your computer.
-2. Connect the device to the same Wi-Fi network as your computer.
-3. Get your device IP address, in Settings → About phone → Status, or by
+1. Connect the device to the same Wi-Fi as your computer.
+2. Get your device IP address, in Settings → About phone → Status, or by
    executing this command:
 
     ```bash
     adb shell ip route | awk '{print $9}'
     ```
 
-4. Enable adb over TCP/IP on your device: `adb tcpip 5555`.
-5. Unplug your device.
-6. Connect to your device: `adb connect DEVICE_IP:5555` _(replace `DEVICE_IP`
-with the device IP address you found)_.
-7. Run `scrcpy` as usual.
-
-Since Android 11, a [Wireless debugging option][adb-wireless] allows to bypass
-having to physically connect your device directly to your computer.
-
-[adb-wireless]: https://developer.android.com/studio/command-line/adb#connect-to-a-device-over-wi-fi-android-11+
-
-If the connection randomly drops, run your `scrcpy` command to reconnect. If it
-says there are no devices/emulators found, try running `adb connect
-DEVICE_IP:5555` again, and then `scrcpy` as usual. If it still says there are
-none found, try running `adb disconnect` and then run those two commands again.
+3. Enable adb over TCP/IP on your device: `adb tcpip 5555`.
+4. Unplug your device.
+5. Connect to your device: `adb connect DEVICE_IP:5555` _(replace `DEVICE_IP`)_.
+6. Run `scrcpy` as usual.
 
 It may be useful to decrease the bit-rate and the definition: