Jetson AGX Xavier Industrial Custom Board terminal hangs on

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
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1

Hi,
I have successfully flashed AGX XAVIER INDUSTRIAL MODULE on our custom carrier board.
While booting terminal output hangs on as last messages are as below…

[ 20.863248] tegra-i2c 31c0000.i2c: I2C transfer timed out
[ 20.975235] tegra-i2c 31c0000.i2c: I2C transfer timed out
[ 20.976179] tegradc 15200000.display: hdmi: edid read failed
��verify_rate_range: FMON_NVDISPLAYHUB: rate 9431578 below min 18750000
fmon_update_config: FMON_NVDISPLAYHUB: detected fault 0x4000
��[ 33.039249] nvidia: loading out-of-tree module taints kernel.
[ 35.417149] Please complete system configuration setup on desktop to proceed…
��verify_rate_range: FMON_NVDISPLAYHUB: rate 9431578 below min 18750000
fmon_update_config: FMON_NVDISPLAYHUB: detected fault 0x4000
verify_rate_range: FMON_NVDISPLAYHUB: rate 9431578 below min 18750000
fmon_update_config: FMON_NVDISPLAYHUB: detected fault 0x4000

I have searched the error and concluded that it is related to HDMP/DP settings, because there is only a DP port on HDMP_DP_2 port of the module. Hence I have changed the file tegra194-p2888-0008-p2822-0000.dtb which was located inkernel/dtb folder.

I have enabled only sor2 dp node, and disabled all others(sor, sor1 and sor3). and updated the kernel-dtb by using the following command.

sudo ./flash.sh -k kernel-dtb jetson-agx-xavier-industrial mmcblk0p1

Update process is being successful. However the output of the terminal never changed. There are always same errors.

What could be the reason of this?

Best regards,
Mustafa

3

Hi mdursun,

What’s your Jetpack version in use?

Could you share the full serial console log for further check?

This command would only update the kernel-dtb in partition rather than in rootfs.
Could you decompile the “/boot/dtb/kernel_XXX.dtb” on your board and modify the related content?

Or you could just flash the whole board to apply the change.

$ sudo ./flash.sh jetson-agx-xavier-industrial mmcblk0p1
4

Hi KevinFFF,

Jetpack version is 5.1.2.

Thank you very much for your suggestion. I have flashed the whole board and the behaviour changed. Now, serial console is active as ubuntu terminal.

I am asking in order to clarify the first method you mentioned. Is it performed on the file system before flashing, or performed online, on xavier’s ubuntu file system?

Best Regards,
Mustafa

5

The first method I mentioned is performed on the board through dtc command to decompile dtb to dts and modify the content directly.

6

So, is it possible to change device-tree file without flashing the whole board?
Will be the changes active after re-boot?

Mustafa

7

Yes, you could decompile the dtb and assemble it back. After reboot, it would load the dtb again with your modification.

Sure, DTB has been modified.

8

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