128 lines
4.6 KiB
ReStructuredText
128 lines
4.6 KiB
ReStructuredText
.. _using_agl_as_uos:
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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 existing issues we still have.
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We hope the steps documented in this article will help others reproduce the
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issues we're seeing, and provide information for further debugging.
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We're using an Apollo Lake-based NUC model `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 be used as well.
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.. image:: images/The-overview-of-AGL-as-UOS.png
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:align: center
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Introduction to AGL
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*******************
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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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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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#. Follow the instructions found in the :ref:`kbl-nuc-sdc` to
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boot "The ACRN Service OS"
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#. In SOS, download the release of AGL from https://download.automotivelinux.org/AGL/release/eel/.
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We're using release ``eel_5.1.0`` for our 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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#. Deploy the UOS kernel modules to UOS virtual disk image
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.. code-block:: none
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$ sudo losetup -f -P --show ~/agl-demo-platform-crosssdk-intel-corei7-64.wic
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$ sudo mount /dev/loop0p2 /mnt
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$ sudo cp -r /usr/lib/modules/4.19.0-27.iot-lts2018 /mnt/lib/modules/
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$ sudo umount /mnt
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$ sync
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.. note::
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Follow the instructions in :ref:`kbl-nuc-sdc`,
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the ``linux-iot-lts2018`` kernels and modules will be installed
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by default after adding the bundle ``kernel-iot-lts2018``.
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Here the version of modules is ``4.19.0-27.iot-lts2018``.
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#. 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 stored the image in another 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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.. 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 this output on the console, AGL has been successfully loaded
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and now you can operate on the console.
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Enable the AGL display
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*************************
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By following these setup steps, you will get a black screen in AGL.
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We provide a workaround for this black screen in the steps below.
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By debugging, we identified the problem as an issue with the (not well supported) ``ivi-shell.so`` library.
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We can light the screen with the weston GUI, as shown 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's ``weston.ini`` configuration file.
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.. code-block:: none
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$ vim /etc/xdg/weston/weston.ini
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Make these changes to ``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, set up an environment variable and restart the weston service:
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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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You should now see the weston GUI in AGL.
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Follow up
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*********
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ACRN Hypervisor is expanding support for more operating systems,
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and AGL is an example of this effort. We continue to debug the ``ivi-shell.so`` issue,
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and investigating why the AGL GUI is not launching as expected.
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