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Usb-to-serial terminal cannot find usb device in /dev

pk flag

I want to use Hirsute Hippo Ubuntu and the gtkterm serial terminal but there is not any usb device in /dev directory.

I used it a few years ago.

At that time I had to insmod cdc-acm.ko from command line to get device in /dev directory. Now I cannot get it.

I did as follows:

steve@Apa:~$ sudo insmod cdc-acm.ko
insmod: ERROR: could not load module cdc-acm.ko: No such file or directory

I tried to change directory where I found it before:

steve@Apa:~$ cd /usr/lib/modules/5.11.0-37-generic/kernel/drivers/usb/class
steve@Apa:/usr/lib/modules/5.11.0-37-generic/kernel/drivers/usb/class$ sudo insmod cdc-acm.ko
insmod: ERROR: could not insert module cdc-acm.ko: File exists

What shall I do to get any usb device?

N0rbert avatar
zw flag
Please share output of `lsusb -t` with USB serial converted connected. Why do you think that you need CDC ACM?
waltinator avatar
it flag
See if it's provided by a package you need to install: `dpkg -S cdc-acm.ko`.
pk flag
@Norbert I used cdc-acm earlier when I needed usb terminal for my microcontroller development. At this moment I have /dev/ttyASM - but my Ubuntu behaves annoying. It is random event if a cold boot results /dev/ttyASM or not.
pk flag
@waltinator I installed and hope the miracle of random exist/not exist /dev/ttyASM will be fixed.
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