Separate USB console and Ethernet setup, warn about USB host mode

Development_Environment/Boards/HowTo.rst

@@ -17,6 +17,10 @@ Alternate Configuration - USB C Host
 In this configuration, USB host mode is used to allow keyboard, mouse and flash
 memory sticks to be connected to the development board.
 
+**Note:** Using the board in this mode means that you will lose access to the
+USB serial console, so it is important to have set up SSH access via Ethernet
+before following these steps.
+
  1. On the target, backup the device tree and copy in the USB host version::
 
       cp /boot/dtbs/librem5-evk.dtb /boot/dtbs/librem5-evk.dtb.bak

Development_Environment/Boards/imx8.rst

@@ -75,20 +75,18 @@ Test Run
 
 There are two simple ways to verify that the development board is
 functioning. It is useful to try both of these to ensure that you can access
-the board via serial and Ethernet connections:
+the board via serial and Ethernet connections.
 
-1. Connect the board to a workstation using the USB A to USB C cable provided.
-   The orange and green lights on the Ethernet connector will light up
-   momentarily.
+If neither of these procedures work for you, please `get in touch`_.
 
-2. Connect the board to a network using the Ethernet socket and a suitable
-   cable. Connect the board to the provided power supply using the provided
-   cable. Two green LEDs will immediately light up between the SoM and the
-   battery holder.
+.. _`get in touch`: https://developer.puri.sm/Librem5/Contact.html
+
+USB Console
+~~~~~~~~~~~
 
-After a moment, the orange Ethernet light should start blinking and the
-vibration motor will give a short burst shortly after, as the MMC image is
-loading. Soon after, it will register as a USB serial device:
+Connect the board to a workstation using the USB A to USB C cable provided.
+The haptic motor will sound briefly and the board should appear shortly
+after as a USB serial device to the workstation.
 
 ::
 
@@ -105,12 +103,21 @@ It will appear in the ``/dev/`` directory as a serial port, such as
    
    pureos-test login: 
 
-It will be possible to log in using ``root`` as both the user name and
+It should be possible to log in using ``root`` as both the user name and
 password, or ``purism`` as the user name and ``123456`` as the password.
 
-If this procedure didn't work for you, please `get in touch`_.
+Ethernet Connection
+~~~~~~~~~~~~~~~~~~~
 
-.. _`get in touch`: https://developer.puri.sm/Librem5/Contact.html
+Connect the board to a network using the Ethernet socket and a suitable
+cable. Connect the board to the provided power supply using the provided
+cable. Two green LEDs will immediately light up between the SoM and the
+battery holder. After a moment, the orange Ethernet light should start
+blinking and the haptic motor will sound briefly. The board should be
+accessible over the network via SSH.
+
+It should be possible to log in using ``purism`` as the user name and
+``123456`` as the password.
 
 Flashing eMMC
 -------------