docs: List incompatible Bluetooth chipsets and settings

Closes: atar-axis#270 Signed-off-by: Kai Krakow <kai@kaishome.de>
kakra · Apr 3, 2021 · 9f55679 · 9f55679
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diff --git a/docs/BT_DONGLES.md b/docs/BT_DONGLES.md
@@ -83,3 +83,13 @@ hci0:   Primary controller
 
 * Unspecified model (https://github.com/atar-axis/xpadneo/issues/180):
   * `btmon` logs showed very low input report rate and high input lag (300ms+)
+
+
+### Intel
+
+* Status: incompatible (https://github.com/atar-axis/xpadneo/issues/270)
+  * OUI: DC:1B:A1 (Intel)
+  * Used as on-board chipset: Gigabyte B450 Aorus Pro WiFi 1.0 with integrated Bluetooth
+* Status: bluetoothd logs "Request attribute has encountered an unlikely error"
+  * Chipset: AX200
+  * Used as on-board chipset: ASUS B550-i
diff --git a/docs/TROUBLESHOOTING.md b/docs/TROUBLESHOOTING.md
@@ -44,6 +44,17 @@ driver and let's you try different combination of parameters. The utility is loc
 `misc/examples/c_hidraw`.
 
 
+### Gamepad does not connect at all, runs a reconnect loop, or immediately disconnects
+
+Check whether ERTM was disabled (see above). Also, some newer models use a different Bluetooth protocol "Bluetooth
+low energe" (BLE) which you may accidentally have disabled. Check the following settings in `/etc/bluetooth/main.conf`:
+```
+[General]
+ControllerMode = dual
+Privacy = device
+```
+
+
 ### Gamepad axes are swapped, seemingly unresponsive or strange behavior
 
 If you observe this problem with `jstest`, `systemsettings joystick` (KDE) or `jstest-gtk`, there's usually nothing