docs: updates to the Raspberry Pi install guide.

docs/installation/debian.rst

@@ -16,11 +16,11 @@ from scratch, we have a guide for installing Debian/Raspbian and Mopidy. See
 
 The packages are built for:
 
-- Debian jessie (stable), which also works for Raspbian jessie and Ubuntu 14.04
-  LTS and newer.
+- Debian stretch (stable), which also works for Raspbian stretch and Ubuntu
+  16.04 LTS and newer.
 
 The packages are available for multiple CPU architectures: i386, amd64, armel,
-and armhf (compatible with Raspberry Pi 1 and 2).
+and armhf (compatible with all Raspberry Pi models).
 
 .. note::
 
@@ -35,16 +35,17 @@ and armhf (compatible with Raspberry Pi 1 and 2).
 
 #. Add the APT repo to your package sources::
 
-       sudo wget -q -O /etc/apt/sources.list.d/mopidy.list https://apt.mopidy.com/jessie.list
+       sudo wget -q -O /etc/apt/sources.list.d/mopidy.list https://apt.mopidy.com/stretch.list
 
 #. Install Mopidy and all dependencies::
 
        sudo apt-get update
        sudo apt-get install mopidy
 
-#. Finally, you need to set a couple of :doc:`config values </config>`, and then
-   you're ready to :doc:`run Mopidy </running>` or run Mopidy as a
-   :ref:`service <service>`.
+#. Finally, you need to set a couple of :doc:`config values </config>`, and
+   then you're ready to :doc:`run Mopidy </running>`. Alternatively you may
+   want to have Mopidy run as a :ref:`system service <service>`, automatically
+   starting at boot.
 
 When a new release of Mopidy is out, and you can't wait for you system to
 figure it out for itself, run the following to upgrade right away::

docs/installation/raspberrypi.rst

@@ -5,23 +5,23 @@ Raspberry Pi
 ************
 
 Mopidy runs on all versions of `Raspberry Pi <https://www.raspberrypi.org/>`_.
-However, note that Raspberry Pi 2 B's CPU is approximately six times as
-powerful as Raspberry Pi 1 and Raspberry Pi Zero, so Mopidy will be more joyful
-to use on a Raspberry Pi 2.
+However, note that the Raspberry Pi 2 and 3 are significantly more powerful than
+the Raspberry Pi 1 and Raspberry Pi Zero; Mopidy will run noticably faster on
+the later models.
 
 .. image:: raspberrypi2.jpg
     :width: 640
     :height: 363
 
 
-How to for Raspbian Jessie
-==========================
+How to for Raspbian
+===================
 
-#. Download the latest Jessie or Jessie Lite disk image from
+#. Download the latest Raspbian Desktop or Lite disk image from
    http://www.raspberrypi.org/downloads/raspbian/.
 
-   If you're only using your Pi for Mopidy, go with Jessie Lite as you won't
-   need the full graphical desktop included in the Jessie image.
+   Unless you need a full graphical desktop the Lite image is preferable since
+   it's much smaller.
 
 #. Flash the Raspbian image you downloaded to your SD card.
 
@@ -32,12 +32,11 @@ How to for Raspbian Jessie
    You'll need to enable SSH if you are not connecting a monitor and a keyboard.
    As of the November 2016 release, Raspbian has the SSH server disabled by
    default. SSH can be enabled by placing a file named 'ssh', without any
-   extension, onto the boot partition of the SD card.
+   extension, onto the boot partition of the SD card. See `here
+   <https://www.raspberrypi.org/documentation/remote-access/ssh/README.md>`_ for
+   more details.
 
-#. If you connect a monitor and a keyboard, you'll see that the Pi boots right
-   into the ``raspi-config`` tool.
-
-   If you boot with only a network cable connected, you'll have to find the IP
+#. If you boot with only a network cable connected, you'll have to find the IP
    address of the Pi yourself, e.g. by looking in the client list on your
    router/DHCP server. When you have found the Pi's IP address, you can SSH to
    the IP address and login with the user ``pi`` and password ``raspberry``.
@@ -47,32 +46,37 @@ How to for Raspbian Jessie
 #. Use the ``raspi-config`` tool to setup the basics of your Pi. You might want
    to do one or more of the following:
 
-   - Expand the file system to fill the SD card.
    - Change the password of the ``pi`` user.
-   - Change the time zone.
+   - Change the language, time zone, etc.
 
    Under "Advanced Options":
 
    - Set a hostname.
    - Enable SSH if not already enabled.
-   - If your will use HDMI for display and 3.5mm jack for audio, force the
-     audio output to the 3.5mm jack. By default it will use HDMI for audio
-     output if an HDMI cable is connected and the 3.5mm jack if not.
-
-   Once done, select "Finish" and restart your Pi.
+   - Force a specific audio output.
+     By default, when using a HDMI display the
+     audio will also be output over HDMI, otherwise the 3.5mm jack will be used.
+   - Adjust the memory split.
+     If you're not using a display (i.e. Raspbian
+     Lite), you should set the minimum value here in order to make best use of
+     the available RAM.
+
+   Once done, select "Finish". Depending on what you changed you may be asked if
+   you want to restart your Pi, select "Yes" and then log back in again
+   afterwards.
 
    If you want to change any settings later, you can simply rerun ``sudo
    raspi-config``.
 
-#. Once you've rebooted and has logged in as the ``pi`` user, you can enter
-   ``sudo -i`` to become ``root``.
 
-#. Install Mopidy and its dependencies as described in :ref:`debian-install`.
+#. Install Mopidy and any Mopidy extensions you want, as described in
+   :ref:`debian-install`.
 
-#. Finally, you need to set a couple of :doc:`config values </config>`, and
-   then you're ready to :doc:`run Mopidy </running>`. Alternatively you may
-   want to have Mopidy run as a :ref:`system service <service>`, automatically
-   starting at boot.
+.. note::
+
+   If you used the Raspbian *Desktop* image you may also need to add the
+   ``mopidy`` user to the ``video`` group. Run ``sudo adduser mopidy video``
+   to do this.
 
 
 Testing sound output
@@ -84,10 +88,5 @@ You can test sound output independent of Mopidy by running::
 
 If you hear a voice saying "Front Center", then your sound is working.
 
-If you want to change your audio output setting, simply rerun ``sudo
-raspi-config``. Alternatively, you can change the audio output setting
-directly by running:
-
-- Auto (HDMI if connected, else 3.5mm jack): ``sudo amixer cset numid=3 0``
-- Use 3.5mm jack: ``sudo amixer cset numid=3 1``
-- Use HDMI: ``sudo amixer cset numid=3 2``
+If you want to change your audio output setting, simply rerun ``sudo 
+raspi-config``.