DP-to-HDMI adapter regression in JetPack 6.2.2

Robotics & Edge Computing Jetson Systems Jetson AGX Orin
1

Platform: Jetson AGX Orin (Tegra234), L4T r36.5 / JetPack 6.2.2

Previous working version: L4T r36.4.4 / JetPack 6.2.1

Issue: Display output fails with passive DP-to-HDMI converters on JP6.2.2. Native DP-to-DP works fine on the same port.

Error from DMesg:

NVRM rpcRmApiControl_dce: NVRM_RPC_DCE: Failed RM ctrl call cmd:0x731341 result 0xffff:

Seems like the DpAuxchCtrl (0x731341) RPC fails repeatedly, preventing sink detection and EDID reads through the DP-to-HDMI converter.

2

Hello @daniel.chaves!

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4

Hi @daniel.chaves

Thanks for reporting this. Since native DP-to-DP works on the same port but DP-to-HDMI converters fail on R36.5 / JetPack 6.2.2, this looks specific to the DP-to-HDMI adapter negotiation path.

The Jetson Linux R36.5 release notes also mention that some DP-to-HDMI converters may not work as expected with Jetson AGX Orin, so could you first share the exact adapter vendor and model you are using?

Please also try one isolation test on R36.5:

  1. Remove hdcp_enabled; from the display device tree

    We have seen a related AGX Orin DP-to-HDMI case where this property affected adapter compatibility. This is not confirmed as the root cause for your case yet, but it is a useful check.

    Also, L4T does not actually support HDCP, so removing this property should not remove functional HDCP support.

  2. If the issue still reproduces, please collect comparison logs

    Please collect the following from both:

    • R36.4.4 / JetPack 6.2.1, where the same adapter works
    • R36.5 / JetPack 6.2.2, where the same adapter fails
    xrandr --verbose

    dmesg | grep -iE "nvrm|dce|dpaux|dp|hpd|edid|display|nvdisplay"

    If possible, please also provide the EDID sysfs output for the DP connector on both releases.

Recommendation: please start with the adapter make/model and the hdcp_enabled; test. If that does not change the behavior, the R36.4.4 vs R36.5 logs will help us compare where sink detection or AUX/EDID handling starts to differ.

Hope this helps!

5

Thank you! After removing the HDCP property it worked for me.

Daniel