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==Virtual Machine==
[[AXEL ULite SOM/DESK-MX6UL-L | DESK-MX6UL-L]] contains all the required software and documentation to start developing Linux application on the AXEL ULite platform. In particular, [[AXEL ULite SOM/DESK-MX6UL-L | DESK-MX6UL-L]] provides a virtual machine, called DVDK, with the following features:
* VirtualBox virtual machine (.OVA archive)
Please note that u-boot and kernel source trees are derived from the official trees released by NXP/Freescale; these trees have been customized to add support for the [[AXEL ULite SOM]].
=== Guest Addictions ===
''Guest Addictions'' installation may fail if the VirtualBox version is different from the VM linux kernel version.
In case of VBox error message:
Error: kernel headers not found
as suggested [https://askubuntu.com/questions/98416/error-kernel-headers-not-found-but-they-are-in-place here], install the correct kernel header using the following command:
sudo apt-get install linux-headers-`uname -r`
and the run the Guest Addictions install
<pre class="workstation-terminal">
dvdk@vagrant:/media/dvdk/VBox_GAs_6.1.18$ sudo ./VBoxLinuxAdditions.run
Verifying archive integrity... All good.
Uncompressing VirtualBox 6.1.18 Guest Additions for Linux........
VirtualBox Guest Additions installer
Removing installed version 6.1.16 of VirtualBox Guest Additions...
update-initramfs: Generating /boot/initrd.img-4.4.0-197-generic
Copying additional installer modules ...
Installing additional modules ...
VirtualBox Guest Additions: Starting.
VirtualBox Guest Additions: Building the VirtualBox Guest Additions kernel
modules. This may take a while.
VirtualBox Guest Additions: To build modules for other installed kernels, run
VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup <version>
VirtualBox Guest Additions: or
VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup all
VirtualBox Guest Additions: Building the modules for kernel 4.4.0-197-generic.
update-initramfs: Generating /boot/initrd.img-4.4.0-197-generic
W: mdadm: /etc/mdadm/mdadm.conf defines no arrays.
VirtualBox Guest Additions: Running kernel modules will not be replaced until
the system is restarted
dvdk@vagrant:/media/dvdk/VBox_GAs_6.1.18$
</pre>
===Host setup===
As stated previously, [[AXEL ULite SOM]] host tools are based on a [[Managed_Virtual_Machine_(MVM)|Managed Virtual Machine]]. As indicated [[AXEL ULiteSOM/AXEL ULite Evaluation Kit/Getting started/Unboxing#microSD_Layout|here]], microSD card delivered along with [[AXEL ULite SOM/AXEL ULite Evaluation Kit | AXEL ULite Evaluation Kit]] includes basic version of MVM that is the default option.
Please follows the README file on the SD card to extract the ''*.ova'' archive and to install the MVM.
