deepstream SDK 4.0 demo test

I installed Jetpack version 4.2.1 on NANO platform,deepstream sdk 4.0 reference Course Installation,Then fail to run the test program。error message:
#deepstream-app -c samples/configs/deepstream-app/config_infer_primary_nano.txt

No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
No EGL Display
nvbufsurftransform: Could not get EGL display connection
** ERROR: <create_multi_source_bin:653>: Failed to create element ‘src_bin_muxer’
** ERROR: <create_multi_source_bin:715>: create_multi_source_bin failed
** ERROR: <create_pipeline:967>: create_pipeline failed
** ERROR: main:632: Failed to create pipeline
Quitting
App run failed

error message:
** ERROR: <create_multi_source_bin:653>: Failed to create element ‘src_bin_muxer’
** ERROR: <create_multi_source_bin:715>: create_multi_source_bin failed
** ERROR: <create_pipeline:967>: create_pipeline failed
** ERROR: main:632: Failed to create pipeline
Quitting
App run failed

Hi,
config_infer_primary_nano.txt is a sub config file. Please run source8_1080p_dec_infer-resnet_tracker_tiled_display_fp16_nano.txt:

nvidia@nvidia-desktop:~$ cd deepstream_sdk_v4.0_jetson/samples/configs/deepstream-app/
nvidia@nvidia-desktop:~/deepstream_sdk_v4.0_jetson/samples/configs/deepstream-app$ deepstream-app -c source8_1080p_dec_infer-resnet_tracker_tiled_display_fp16_nano.txt

If it still does not work, please clean gstreamer cache and try again:
https://docs.nvidia.com/metropolis/deepstream/4.0/dev-guide/index.html#page/DeepStream_Development_Guide%2Fdeepstream_quick_start.html%23wwpID0E05E0HA

thanks,
implement “rm ${HOME}/.cache/gstreamer-1.0/registry.aarch64.bin” can solve this problem.

How do I turn EGL Display off?