SDL Video Display not working in Simulink (MATLAB Coder Support Package for NVIDIA Jetson and NVIDIA DRIVE Platforms)

Hello,

SDL Video Display block doesn't work on Simulink (see screenshot below)

When I deploy it into a NVIDIA Jetson AGX Xavier (from Simulink) it makes the screen complitely black.

I've checked if the SDL Video Display works compiling a code from a MATLAB script (no Simulink), and it works!

How can I make it works also from Simulink? I suppose it's an implementation bug of the Simulink block itself.

Check this video to see the bug behaviour: https://youtu.be/ziGx2ferEU4

Thank you in advance

[Paolo Rosettani]

News:

It works if I just Build it and then lunch the .elf file from the NVIDIA Jetson Terminal.

The screen turns Black only if I use the button "Build Deploy & Start".

[Hariprasad Ravishankar]

Hi Paolo,

We are looking into this issue and we wil get back with any findings.

Hari

[Paolo Rosettani]

Thank you! :)

[Ramakrishna Mandalapu]

Hi Paolo,

Sorry for the inconvinience. The display package might have updated recently because of which some settings are behaving differently. We will fix this in our monthly update. For now, you can skip this error by using the below workaround.

On target: Step#1

Get the display environment by running the following command

>> echo $DISPLAY #copy the output of this command

localhost:1.0

On host: Step#2

hwobj = jetson('IPAddress','username','password');

hwobj.setDisplayEnvironment('localhost:1.0'); % output of the command from target as input to this function.

Step#3: Deploy&Run the model.

Please let us know if there are any other issues.

Thanks,

Ramakrishna

[Paolo Rosettani]

Is it normal if i've this output?

:0

I've tried with this:

hwobj.setDisplayEnvironment(':0');

But I've the same issue.

[ohrum cha]

i have same issue

Answer 1

[Ramakrishna Mandalapu]

Hi Paolo,

Please try the follwing the steps to get rid off the blank screen issue.

on target: Step#1

Get the display environment by running the following command

>> echo $DISPLAY #copy the output of this command

localhost:1.0

On host: Step#2

hwobj = jetson('IPAddress','username','password');

hwobj.setDisplayEnvironment('localhost:1.0'); % output of the command from target as input to this function.

Step#3: Deploy&Run the model.

Thanks,

Ramakrishna