Hi,
then can you dump the Xorg log with the following debugging information?
#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
https://elinux.org/Jetson_TX2/r28_Display_debug
Paste your /var/log/Xorg.0.log
here.