I saw the below message in your syslog. Please try to run the command after killing the X server gdm process.
Sep 1 21:26:47 tegra-ubuntu nvsipl_camera: Module_id 0 Severity 2 : NvKms Backend failed to acquire required permissions.
I saw the below message in your syslog. Please try to run the command after killing the X server gdm process.
Sep 1 21:26:47 tegra-ubuntu nvsipl_camera: Module_id 0 Severity 2 : NvKms Backend failed to acquire required permissions.