Jetson TX1 Serial Console doesn't work

Hi
I have problem to controlling jetson tx1 with serial console
when I connect the usb2serial to serial console port on jetson
I get everything right and see complete boot logs on startup
but I cannot type anything to serial port
seems like the receiver line on console port is disabled
I tried usb2serial and it is the same
I try different serial port monitor and it is the same
is there any way that can fix this problem ?
any thing that I have to change in os ?
my serial port is /dev/ttyS0

Hi,
Do you use TX1 developer kit with Jetpack 4.6.6? This is the latest Jetpack 4 release. If you use previous version, we would suggest upgrade to the latest version and try.

@DaneLLL Thank’s for your response
are you sure this problem for jetpack version ?

Hi,
Certain issues are fixed in later release so would be great if you can use the latest version.

Another reason can be some kernel configs are missing, such as CONFIG_USB_ACM. This would need other users to share experience.