Serial port greyed out

serial port greyed out. newly installed and updated. Ubuntu 18.04
Have tried many approaches none worked.

When the Serial port menu is greyed out, it means there are no available ports.

That seems to be for Windows only


which board; original or clone?

which version of the IDE; installed through repository (outdated) or downloaded from this site?

try different cables; there are charge-only cables that will not carry the needed data

what do dmesg and lsusb say when you connect the board

I'm no longer a Linux user so might not be able to assist further.