Red screen with "vid_rend: syncpoint wait timeout"

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

hi

The hardware connection is:

Camera->HDMI->TC358743->TX2->HDMI->4K-monitor

When running a simple capture-display pipeline, the monitor screen turns all red. Terminal printing “vid_rend: syncpoint wait timeout”

ubuntu@tegra-ubuntu:~$ DISPLAY=:0 gst-launch-1.0 v4l2src device=/dev/video1 ! \
video/x-raw,width=1920,height=1080,framerate=30/1,format=UYVY ! nvvidconv ! \
video/x-raw\(memory:NVMM\),width=1920,height=1080,framerate=30/1,format=I420 ! nvoverlaysink
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
vid_rend: syncpoint wait timeout
'vid_rend: syncpoint wait timeout
'vid_rend: syncpoint wait timeout
'vid_rend: syncpoint wait timeout
'vid_rend: syncpoint wait timeout
'vid_rend: syncpoint wait timeout

The red screen doesn’t go back normal when I kill the pipeline.

I tried using another 1080P monitor, this issue no longer happen. Can anyone give me some pointers where to start debugging this?

Thanks.

2

xliu,

Please run your pipeline with “sudo service lightdm stop” first. Are you on rel-28.2?

3

hi Wayne,

I’m on 28.1.

I tried several times with lightdm service stopped. This issue never happened. Is this a known bug in pre-28.2 releases? Is it fixed in 28.2?

In my application, I need to detect monitor resolution, so I need the lightdm service on (it loads the necessary X11 libs).

Thanks.

4

This is a known bug and we have workaround in rel-28.2. (Not applicable to rel-28.1)

Please add below option to xorg.conf

Section "Device"
      Identifier  "Tegra0"
      Driver      "nvidia"
  # Allow X server to be started even if no display devices are connected.
      Option      "AllowEmptyInitialConfiguration" "true"
    <b>  Option      "TegraReserveDisplayBandwidth" "false</b>
5

Is this issue present on TX1 also?

6

It should not.