Jetson nano HDMI output resolution too low to output on standard dell HDMI monitor!

[bin_rhythm]

problem #1: HDMI output resolution
check hdmi-0 initial output resolution
sudo cat /sys/kernel/debug/tegradc.0/mode

result is 640x350, my dell monitor can not display it. out of range…

xrandr command can list hdmi-0 and dp-0 output supported timing from display controller of GPU.
hdmi-0 [my monitor does not support these resolution, so out of range…]
640x350 - 85hz
1392x1392 - 60hz

dp-0 [work normal]
1440x900 - 59.89hz
1280x1024 - 75.03hz
…

how to modify configuration file , to change hdmi-0 default output resolution ???

problem #2: under DP-0 environments, ffmpeg, gstreamer can not work!!!
DP-0 can normal display, but under DP-0 display, ffplay can not decode multimedia file.
ffplay_decode_error|690x388
error related to D-BUS, arguments to dbus-message_new_method_call() were incorrect…

under DP-0, gst-launch-1.0 neither not work like ffplay, does not launch imx219 or usb web camera.

my os image is jetson-nano-jp46-sd-card-image
cat infor as following
distrib id = ubuntu
distrib release = 18.04
distrib codename=bionic
distrib description=ubuntu 18.04.6 LTS

[WayneWWW]

Please attach the full dmesg and /var/log/Xorg.0.log.

The logic here is wrong. Jetson nano would not just give you a weird mode output to your monitor. It is your monitor tells the source side to output such mode.

For DP0, please file another issue. It has nothing to do with HDMI issue here. Tracking in separate topics would be better.