Create my own image on sdcard with console application not ubuntu

yossii · February 2, 2023, 3:17pm

hi all,
I would like to create an Linux console application without Ubuntu on Jetson nano.

Can you send how to do it ?
Is it possible to take Ubuntu image and reduce Ubuntu and work it as console only ?

robertogs2 · February 2, 2023, 4:42pm

For reducing the Ubuntu image, I suggest you can create a Yocto Image using the meta-tegra layer. Yocto is a project that lets you create a custom Linux distribution only with the things you need on it.

For example for the Jetson Nano, you can follow these steps to create the image:

And then use the following ones to flash the board with that created image.

===================================================

Another option, if what you only want is to disable the GUI from Ubuntu, it works like this:
For this you might need to check the system boot target.

Basically the system will boot according to the target at which the following symbolic link is pointing to: /lib/systemd/system/default.target

To have a GUI, it should point to /lib/systemd/system/graphical.target
To boot without GUI (text mode) it should point to /lib/systemd/system/multi-user.target

This setting can be overwritten by the existence of the /etc/systemd/system/default.target symbolik link. which has a higher priority than the one on /lib/.

This /etc/ file is created by using the systemctl commands to change the default target, these are explained here

In summary:
To disable GUI run: sudo systemctl set-default multi-user.target
To enable GUI run: sudo systemctl set-default graphical.target

Then reboot.

Regards,
Roberto Gutierrez,
Embedded SW Engineer at RidgeRun
Contact us: support@ridgerun.com
Developers wiki: https://developer.ridgerun.com/

yossii · February 5, 2023, 2:40pm

hi Roberto,
I have configured the Yocto and get th following error:

yitach@yitach-lt:~/fibernet/kvm_over_ip/yocto-tegra$ bitbake core-image-sato-dev
WARNING: Host distribution “ubuntu-22.04” has not been validated with this version of the build system; you may possibly experience unexpected failures. It is recommended that you use a tested distribution.
ERROR: OE-core’s config sanity checker detected a potential misconfiguration.
Either fix the cause of this error or at your own risk disable the checker (see sanity.conf).
Following is the list of potential problems / advisories:

MACHINE=jetson-nano-devkit is invalid. Please set a valid MACHINE in your local.conf, environment or other configuration file.

Summary: There was 1 WARNING message shown.
Summary: There was 1 ERROR message shown, returning a non-zero exit code.

The local.conf has:
MACHINE ?= “jetson-nano-devkit”

DISTRO_FEATURES = “x11 opengl”

IMAGE_CLASSES += “image_types_tegra”
IMAGE_FSTYPES = “tegraflash”

SSTATE_DIR ?= “/home/yitach/fibernet/kvm_over_ip/yocto_state_dir/”
DL_DIR ?= “/home/yitach/fibernet/kvm_over_ip/yocto_downloads/”

Thx,
Yossi

yossii · February 6, 2023, 6:31am

hi Roberto,
I follow the instructions and got the errors:

yitach@yitach-lt:~/fibernet/kvm_over_ip/yocto-tegra$ bitbake core-image-sato-dev
WARNING: Host distribution “ubuntu-22.04” has not been validated with this version of the build system; you may possibly experience unexpected failures. It is recommended that you use a tested distribution.
ERROR: OE-core’s config sanity checker detected a potential misconfiguration.
Either fix the cause of this error or at your own risk disable the checker (see sanity.conf).
Following is the list of potential problems / advisories:

MACHINE=jetson-nano-devkit is invalid. Please set a valid MACHINE in your local.conf, environment or other configuration file.

Summary: There was 1 WARNING message shown.
Summary: There was 1 ERROR message shown, returning a non-zero exit code.
yitach@yitach-lt:~/fibernet/kvm_over_ip/yocto-tegra$

Yossi

robertogs2 · February 6, 2023, 3:31pm

Hi @yossii

It could be that the current meta-tegra branch has been updated for JetPack 5 and it doesn’t support Nano anymore.

So can you please tell me which version of meta-tegra do you have?

Go into the meta-tegra folder and please let me know the output of

git branch

To be more clear, this is the master branch of the meta-tegra layer: Now with JetPack 5 it doesn’t support Jetson Nano: meta-tegra/conf/machine at master · OE4T/meta-tegra · GitHub

The dunfell one, in this case does support it because it is a little bit older: meta-tegra/conf/machine at dunfell · OE4T/meta-tegra · GitHub

There you can see the jetson-nano-devkit.conf file (only on dunfell), I want to know if that file exists, if not, then you might need to checkout to the dunfell branch.

Regards,
Roberto

yossii · February 8, 2023, 7:46am

hi Roberto,

yit@yi-lt:~/fibernet/kvm_over_ip/yocto-tegra/poky$ git branch

dunfell
yit@yi-lt:~/fibernet/kvm_over_ip/yocto-tegra/poky$

yossii · February 12, 2023, 8:09am

Any update Roberot, see the git branch is dunfell …
y@y-lt:~/kvm_over_ip/yocto-tegra/meta-tegra$ git branch

dunfell
y@y-lt:~/kvm_over_ip/yocto-tegra/meta-tegra$

robertogs2 · February 13, 2023, 2:58pm

Hi @yossii,

Can you share with me your build/local.conf and the build/bblayers.conf files? To see if we are working properly with the meta-tegra layer. Also, can you plese provide the output of

ls ~/kvm_over_ip/yocto-tegra/meta-tegra/conf/machine/

Regards,
Roberto

yossii · February 16, 2023, 11:48am

Hi Roberto,
Attached is the file.

Roberto addtional question:

Does Jesson Nano can run video 4K 30 FPS ?
Is there Nvidia driver for it? We be able to run 1080p but not 4K 30 fps.

yossii · February 16, 2023, 12:05pm

conf.tar.xz (4.9 KB)

yossii · February 16, 2023, 12:09pm

machine.tar.xz (3.9 KB)

robertogs2 · February 16, 2023, 3:55pm

Hi,

I see you are missing the bblayers.conf step from this subsection:

The one where you add the meta-tegra layer to the bblayers.conf file.

Please double check if there is any other step missing from there.

===========================================================

The imx477 can provide 4k@30fps, before jetpack 4.6 we used these patches to add it to the kernel: Raspberry Pi HQ camera IMX477 Driver | Linux driver for Jetson | RidgeRun - RidgeRun Developer Connection

I think from 4.6 onwards, it is already integrated into the source code and it should be a matter of enabling it on the config and device tree. The Jetson Nano should be able to handle it.

Regards,
Roberto

yossii · February 19, 2023, 6:32am

See the file

POKY_BBLAYERS_CONF_VERSION is increased each time build/conf/bblayers.conf

changes incompatibly

POKY_BBLAYERS_CONF_VERSION = “2”

BBPATH = “${TOPDIR}”
BBFILES ?= “”

BBLAYERS ?= "
/home/yitach/fibernet/kvm_over_ip/yocto-tegra/poky/meta
/home/yitach/fibernet/kvm_over_ip/yocto-tegra/poky/meta-poky
/home/yitach/fibernet/kvm_over_ip/yocto-tegra/poky/meta-yocto-bsp
"
bblayers.conf (385 Bytes)

I follow all step by step and got the errors …

What else is missing ?

robertogs2 · February 21, 2023, 2:20pm

Hi @yossii

It should look like this, according to the bblayers.conf section:

BBLAYERS ?= " \
/home/${USER}/yocto-tegra/meta-tegra \
/home/${USER}/yocto-tegra/poky/meta \
/home/${USER}/yocto-tegra/poky/meta-poky \
/home/${USER}/yocto-tegra/poky/meta-yocto-bsp \
"

You see there is a meta-tegra layer added there, which you should have alongside the other layers

Regards,
Roberto

yossii · February 23, 2023, 3:19pm

It seems it work

yossii · March 16, 2023, 2:58pm

Hi Roberto,
The compilation is ended OK.
Can you guide me when I could see the:

The bootloader SRC and bins.
The kernel SRC and uimage.
The rootfs SRC and tars files.

Thx