MaaxBoard HDMI not working

Hi John,

What are you using for a power supply? We reccomend a 5V 3A supply such as this https://www.avnet.com/shop/us/products/avnet-engineering-services/aes-acc-maax-pwrul-3074457345642357173/

It appears it is initially working, then perhaps when you try to interact with it, you are experiencing an Over Current moment for your current supply?

Can you also try to manually set the resolution to 1920x1080 to see if that helps? Also are you getting any error messages? Also do you have an additional HDMI display you could try the MaaXBoard with?

Thx,

Josh

I have tried both a 5.1V 3.5A & a 5V 3.0A supplies.

The same thing happens with both supplies.

Hi John,

The supply you are using should be ok.

Are you able to try a different display? There may be a compatibility issue. Do you have a 3.3V UART TTL debugger you can use to monitor the console output during failure? If so please connect it to the UART on the 40pin gpio header and use a terminal application to see what is happening.

I'll reach out to the SW engineering team responsible for this board and get reccomendations. Should have an answer for you come tomorrow.

-Josh

Hi John,

The supply you are using should be ok.

Are you able to try a different display? There may be a compatibility issue. Do you have a 3.3V UART TTL debugger you can use to monitor the console output during failure? If so please connect it to the UART on the 40pin gpio header and use a terminal application to see what is happening.

I'll reach out to the SW engineering team responsible for this board and get reccomendations. Should have an answer for you come tomorrow.

-Josh

Thank you Joshua,

I was able to borrow a 1080 monitor and everything is functional.
I was able to configure a static IP so I can ssh into it for future modifications.

Please ask the SW engineering team the following:
What file can I modify to force the resolution to 1080 or lower on startup? This allows me to use my monitor instead of the borrowed one.

This build info via uname -a may help them:
     Linux maaxboard 4.14.78 #1 SMP PREEMPT Tue Jan 14 02:48:31 UTC 2020 aarch64 GNU/Linux

Hi John,

Here is what I received back from my SW support team.

Customers could modify the Weston config file to change the resolution.

```bash

nano /etc/xdg/weston/weston.ini

```

```ini

#[output]

#name=HDMI-A-1

#mode=1920x1080@60

#transform=90

```

Then, restart the Weston service

```bash

systemctl restart weston@root

```

Thx,

Josh

Thank you Joshua,

This is the same answer I found from another of your replies here: https://www.element14.com/community/message/290407/l/re-how-to-change-hdmi-output-resolution#290407

I am able to rectify it when I ssh and manually modify the file and restart the system.