HDMI Can’t Output 4K@60 on Nvidia Jetson Orin Nano

Issue Overview

The issue discussed in the forum revolves around the Nvidia Jetson Orin Nano Dev board’s inability to output a 4K@60Hz signal to certain monitors. Users have reported that while one monitor successfully displays 4K@60, another compatible monitor does not.

Specific Symptoms

• Inconsistent output of 4K@60Hz across different monitors.
• Users specifically noted that one monitor supports 4K@60Hz while another does not, despite both being compatible.

Context

• The problem occurs when attempting to use the HDMI output of the Jetson Orin Nano during normal operation.
• The issue was raised in a context of testing with multiple monitors.

Hardware/Software Specifications

• The Jetson Orin Nano Dev board is being tested with two different 4K monitors.
• The relevant software mentioned includes the Jetson Linux Developer Guide documentation.

Frequency and Impact

• The issue appears to be consistent across different setups with the Orin Nano, particularly regarding its specifications.
• The inability to output at the desired resolution impacts user experience, especially for applications requiring high-resolution displays.

Possible Causes

• Hardware Limitations: The Orin Nano does not support 4K@60Hz output as specified in Nvidia’s documentation, which directly leads to this issue.

• Software Bugs or Conflicts: If there were any updates or changes in software that affect HDMI output capabilities, it could lead to unexpected behavior.

• Configuration Errors: Incorrect settings in the display configuration could prevent proper output.

• Driver Issues: Outdated or incorrect drivers may affect HDMI functionality, although this seems less likely given the clear specification from Nvidia.

• User Errors: Misunderstanding of supported resolutions could lead users to expect functionality that is not present.

Troubleshooting Steps, Solutions & Fixes

1. Check Documentation: Refer to the Jetson Linux Developer Guide to confirm supported resolutions and refresh rates for the Orin Nano. It is noted that 4K@60Hz is not supported.

2. Dump xrandr Results:

   • Execute the following command in the terminal to gather display information:

     xrandr
     

   • Review the output for supported resolutions and refresh rates.

3. Test with Different Configurations:

   • If possible, test the Orin Nano with other compatible hardware (e.g., Xavier NX Devkit) to see if it can achieve 4K@60Hz with the same monitor setup.

4. Monitor Compatibility Check:

   • Ensure that both monitors are indeed capable of displaying 4K@60Hz and are correctly configured (e.g., correct input source selected).

5. Update Drivers and Firmware:

   • Check for any available updates for drivers or firmware related to the Jetson Orin Nano that might improve HDMI functionality.

6. Best Practices:

   • Always verify specifications before purchasing hardware intended for use with the Orin Nano.
   • Regularly check for updates in documentation or community forums for any changes in capabilities or workarounds.

Unresolved Aspects

While users have confirmed that one monitor works while another does not, further investigation may be required into specific monitor settings or compatibility issues that could affect performance. Additionally, since it has been established that 4K@60Hz is not supported on the Orin Nano, users should consider alternative configurations or hardware if higher resolution output is essential.