2018-12-04 17:13:19 +08:00
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.. _using_agl_as_uos:
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2018-12-04 15:50:05 +08:00
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Using AGL as the User OS
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########################
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This tutorial describes the steps to run Automotive Grade Linux (AGL)
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as the User OS on ACRN hypervisor and the problems we got at current stage.
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We hope the steps documented in this article could help us to reproduce the
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problem much easier and provide some information for further debugging.
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.. image:: images/The-overview-of-AGL-as-UOS.png
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:align: center
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2018-12-06 14:29:35 +08:00
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Introduction to AGL
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2018-12-04 15:50:05 +08:00
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*******************
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2018-12-06 14:29:35 +08:00
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Automotive Grade Linux is a collaborative open source project that is
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bringing together automakers, suppliers and technology companies to
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accelerate the development and adoption of a fully open software stack
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for the connected car. With Linux at its core, AGL is developing an open
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platform from the ground up that can serve as the de facto industry
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standard to enable rapid development of new features and technologies.
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2018-12-04 15:50:05 +08:00
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For more information about AGL, please visit AGL’s official website:
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https://www.automotivelinux.org/.
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Steps for using AGL as the UOS
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******************************
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2018-12-06 14:29:35 +08:00
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The regulatory model of NUC we used is `NUC6CAYH
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<https://www.intel.com/content/www/us/en/products/boards-kits/nuc/kits/nuc6cayh.html>`_
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and other platforms may work too.
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2018-12-04 15:50:05 +08:00
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#. Prepare the Service OS (SOS)
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Follow the instructions found in the Getting started guide for Intel NUC
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to setup SOS :ref:`getting-started-apl-nuc`.
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#. Prepare the User OS (UOS)
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Download the release of AGL from https://download.automotivelinux.org/AGL/release/eel/,
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and we will use ``eel_5.1.0`` release for example.
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.. code-block:: none
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cd ~
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wget https://download.automotivelinux.org/AGL/release/eel/5.1.0/intel-corei7-64/deploy/images/intel-corei7-64/agl-demo-platform-crosssdk-intel-corei7-64.wic.xz
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unxz agl-demo-platform-crosssdk-intel-corei7-64.wic.xz
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You need to adjust the ``/usr/share/acrn/samples/nuc/launch_uos.sh`` script to match your installation.
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These are the couple of lines you need to modify:
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.. code-block:: none
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-s 3,virtio-blk,/root/agl-demo-platform-crosssdk-intel-corei7-64.wic \
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-k /usr/lib/kernel/default-iot-lts2018 \
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-B "root=/dev/vda2
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.. note::
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In case you have downloaded a different AGL image or store the image in other directory,
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you will need to modify the AGL file name or directory (the ``-s 3,virtio-blk`` argument)
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to match what you have downloaded above.
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Likewise, you may need to adjust the kernel file name to ``default-iot-lts2018``.
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#. Start the User OS (UOS)
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You are now all set to start the User OS (UOS).
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.. code-block:: none
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sudo /usr/share/acrn/samples/nuc/launch_uos.sh
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**Congratulations**, you are now watching the User OS booting up!
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And you should be able to see the console of AGL:
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.. image:: images/The-console-of-AGL.png
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:align: center
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When you see the output of the console above, that means AGL has been loaded
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and now you could operate on the console.
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Enable the display of AGL
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*************************
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But following the setup steps before, you will get black screen in AGL.
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Please don't worry about it, and we will give the solutions to the black screen issue in AGL.
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By debugging, we identified the problem as an issue of ``ivi-shell.so`` library, it seems that
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this library is not well supported. But we can light the screen with the GUI of weston like figure below.
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.. image:: images/The-GUI-of-weston.png
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:align: center
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To enable weston in AGL, We need to modify ``weston.ini``, which is the configuration file of weston.
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.. code-block:: none
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vim /etc/xdg/weston/weston.ini
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The changes of ``weston.ini``:
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#. Comment ``ivi-shell.so`` out
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#. Check the name of output is ``HDMI-A-2``
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After that, there are still some steps need to do to launch weston in AGL:
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.. code-block:: none
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export XDG_RUNTIME_DIR=/run/platform/display
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systemctl restart weston
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And you will be able to see the GUI of weston in AGL now.
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Follow up
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*********
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ACRN Hypervisor is trying to support more kinds of operating systems all the time,
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and AGL is an example of them. We are still debugging the “ivi-shell.so” issue,
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and we are also investigating the problem why AGL GUI not got launched,
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currently it may either be a configuration issue or a real bug, more experiment will be done.
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