Jetson Xavier NX HDMI

When the NX is plugged into the motherboard developed by us and turned on, 1080P will be displayed on the Nvidia screen, but only 720P will be displayed on the ubuntu interface when the NX is turned on.

attach dmesg
dmesg.log (81.6 KB)

    1.827494] tegradc 15200000.nvdisplay: hdmi: edid read failed
[    1.827738] tegradc 15200000.nvdisplay: hdmi: using fallback edid
[    1.827839] tegradc 15200000.nvdisplay: blank - powerdown

Please review your hardware. The reason to see 720p is because our driver is not able to read edid from your monitor. Based on past experience, mostly likely a hardware problem.

Hey @WayneWWW our Xavier NX also shows the edid read message for every monitor we plug in.
Are there some super special requirements for the display?

I suggest to add “ModeDebug” to “/etc/X11/xorg.conf”:

Section "Device"
    Option "ModeDebug"

Then reboot, and post the log “/var/log/Xorg.0.log”. With that information the driver itself will tell you what modes it accepts or rejects.

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