[BUG]

[MomoHsieh]

Describe the issue Hi, I want to use USB device on ACM device. But when I plug-in USB, it didn't show up the ttyACM0 in /dev. I tested on SD card without SSD, it will show up.

What version of L4T/JetPack L4T/JetPack version: 4.4.1

Which Jetson Jetson: NX

With SSD and use rootOnNVMe [ 117.791699] usb 1-2.4: new full-speed USB device number 5 using tegra-xusb [ 117.813803] usb 1-2.4: New USB device found, idVendor=0483, idProduct=5740 [ 117.813814] usb 1-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 117.813821] usb 1-2.4: Product: STM32 Virtual ComPort [ 117.813827] usb 1-2.4: Manufacturer: STMicroelectronics [ 117.813832] usb 1-2.4: SerialNumber: 00000000001A

Without SSD use SD card [ 260.787731] usb 1-2.3: new full-speed USB device number 10 using tegra-xusb [ 260.813921] usb 1-2.3: New USB device found, idVendor=0483, idProduct=5740 [ 260.813944] usb 1-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 260.813953] usb 1-2.3: Product: STM32 Virtual ComPort [ 260.813957] usb 1-2.3: Manufacturer: STMicroelectronics [ 260.813961] usb 1-2.3: SerialNumber: 00000000001A [ 260.816696] cdc_acm 1-2.3:1.0: ttyACM0: USB ACM device

Please help, thanks.