Open more log for display port on Orin Nano

[ruei_chang]

Hello,

I would like to inquire about enabling more detailed logging during the DisplayPort connection and connection process.

I have observed that most debug messages related to DisplayPort are typically found in /var/log/Xorg.0.log.

I extracted keywords from /var/log/Xorg.0.log to identify the source file containing them. The grep command returned the following path: Linux_for_Tegra/rootfs/usr/lib/xorg/modules/drivers/nvidia_drv.so.

As I am unable to directly modify this file, I am seeking a solution to enable more comprehensive logging, specifically to examine the handshake actions during the DisplayPort connection.

For instance, I would like to capture messages related to DP1_AUX_P/DP1_AUX_N during EDID information retrieval.

[WayneWWW]

What kind of “message” do you need here? Xorg is userspace level driver. There are also kernel levels drivers which are open source.

There could be more logs in xorg log by adding mode debug option.

#Add below option in /etc/X11/xorg.conf, ‘Section “Device”’. Verbose mode logging will be shown in /var/log/Xorg.0.log
Section “Device”
…
Option “ModeDebug”
…
EndSection

[ruei_chang]

Thank you, Sir. ModeDebug is working, and the results are excellent. I needed this because we’re experiencing a problem with the DisplayPort connection. As I mentioned, according to the Orin Nano documentation, I don’t have the ability to modify the DisplayPort code. Therefore, our vendor requested additional debug messages during the connection process.