Instruct to do a manual upgrade instead of complex operation in the system...

Instruct to do a manual upgrade instead of complex operation in the system partition (#15557#note-23)

wiki/src/support/known_issues.mdwn

@@ -489,12 +489,17 @@ the video and watching it in the Totem video player.
 
 <a id="automatic_upgrade_fails"></a>
 
-Tails does not boot after automatic upgrade
--------------------------------------------
+Tails fails to start or behaves weirdly after an automatic upgrade
+------------------------------------------------------------------
 
-Sometimes, after an automatic upgrade, Tails
-gets blocked when booting, often after the message
-'Loading, please wait...'.
+Sometimes, after an automatic upgrade, your Tails might either:
+
+- Fails to start. Often after the message:
+
+  <pre>Loading, please wait...</pre>
+
+- Behaves weirdly. For example, your keyboard does not work or you cannot
+  connect to a network.
 
 To fix this problem, you can [[update your Tails
 manually|doc/first_steps/upgrade/#manual]].
@@ -533,81 +538,6 @@ If you encounter this problem:
 Your <span class="filename">Persistent</span> folder and persistent feature
 configurations should be restored.
 
-<a id="partial-upgrade"></a>
-
-## Tails behaves weirdly if an automatic upgrade is only partially applied
-
-Tails might behave weirdly if an automatic upgrade is only partially applied.
-For example, your keyboard might not respond to key presses or you might
-be unable to connect to networks.
-
-To fix this problem:
-
-### Mount your Tails system partition in another Linux system
-
-1. Start in another Tails or in a Linux system such as Debian or Ubuntu.
-
-1. Open <span class="application">GNOME Disks</span>.
-
-1. Plug in your Tails USB stick that behaves weirdly.
-
-1. If a prompt appears to unlock the persistent volume on your Tails
-   USB stick, click <span class="button">Cancel</span>.
-
-1. Your Tails USB stick should appear in the left pane of
-   <span class="application">GNOME Disks</span>. Click on your Tails USB
-   stick.
-
-1. In the right pane, click on the partition labeled
-   <span class="guilabel">Tails</span>. It should be listed as
-   <span class="guilabel">Partition 1</span>.
-
-1. Click on the
-   <span class="button">[[!img lib/media-playback-start.png alt="Mount selected partition" class="symbolic" link="no"]]</span>
-   button to mount the Tails partition.
-
-1. Click on the link in the right pane to open the Tails partition in the <span class="application">Files</span>
-   browser. The link should look something like
-   <span class="filename">/media/<span class="command-placeholder">username</span>/Tails</span>.
-
-### Edit your <span class="filename">Tails.module</span> file
-
-1. In the <span class="application">Files</span> browser, open the <span class="filename">live</span> folder.
-   Then open the file named <span class="filename">Tails.module</span>
-   with a text editor, for example, <span class="application">GNOME Text Editor</span>.
-
-1. Add the line <span class="command-placeholder">x.x</span>.squashfs to the
-   end of the <span class="filename">Tails.module</span> file. Replace
-   <span class="command-placeholder">x.x</span> with the Tails version you are
-   upgrading to.
-
-   For example, if you are upgrading to version 3.8, you would
-   add `3.8.squashfs` to the end of the <span class="filename">Tails.module</span> file.
-
-   Your <span class="filename">Tails.module</span> file should look
-   something like this, with different version numbers:
-
-   <pre>
-   filesystem.squashfs
-   3.7.squashfs
-   3.7.1.squashfs
-   3.8.squashfs
-   </pre>
-
-1. Save the <span class="filename">Tails.module</span> file.
-
-1. In the sidebar of the <span class="application">Files</span> browser, click on the
-   <span class="guimenu">[[!img lib/media-eject.png alt="Eject" class="symbolic" link="no"]]</span>
-   button on the <span class="guilabel">Tails</span> label to unmount the
-   partition.  If your persistent volume shows in the sidebar, also click on
-   the
-   <span class="guimenu">[[!img lib/media-eject.png alt="Eject" class="symbolic" link="no"]]</span>
-   button on the persistent volume label.
-
-1. Unplug your Tails USB stick.
-
-Your Tails should now work properly.
-
 <a id="restart-shell"></a>
 
 ## Icons and information located on the top right corner of the screen disappeared