SANE
====

Upgrading from Debian 10 to Debian 11
-------------------------------------

+----+---------------------------------------------------------------------------------------+-----------------------------------------------------+
| Id | Reference                                                                             | License                                             |
+----+---------------------------------------------------------------------------------------+-----------------------------------------------------+
| 1  | https://bugs.launchpad.net/hplip/+bug/1817214                                         | unknown                                             |
+----+---------------------------------------------------------------------------------------+-----------------------------------------------------+

After upgrading to Debian 11 the HP AIO scanner took very long to be detected
and sometimes it did not work.

1. install these packages

   .. code-block:: shell-session

      apt-get install hp-ppd hplip hplip-data libhpmud0 sane

2. reinstall ``libsane-hpaio`` as suggested by reference 1

   .. code-block:: shell-session

      apt --reinstall install libsane-hpaio

3. comment all backends in ``/etc/sane.d/dll.conf``
4. you should have a :download:`file <includes/etc/sane.d/dll.d/hplip>`
   in the SANE configuration, like this

   .. literalinclude:: includes/etc/sane.d/dll.d/hplip
      :language: ini
      :linenos:
      :caption: /etc/sane.d/dll.d/hplip

5. check if scanimage detects the scanner in a matter of seconds

   .. code-block:: shell-session

      scanimage -L

6. check if remote scanning still works