Hello everyone,

I seem to be having an issue with my Qotom Q190P embedded computer's back 3 serial ports.

The single front serial port uses an IT8758 Super IO driver chip and works perfectly, however, I am unable to send or receive any data on the back 3 ports.

I have tried quite a few solutions with no success. The ports show up with addresses, UARTs and IRQs under "/proc/tty/driver/serial", however, when attempting to use a multitude of different programs to send or receive data nothing works.

I have been looking around and it appears that linux supports the IT8758 chip used for the front port but doesn't support the IT8768 chip use for the back ones. Is anyone able to point me in a direction to solving this issue or let me know if there is no support for the IT8768 chip?

Greatly appreciated,

Please help…

I didn't find the right solution from the Internet.
References
https://www.linuxquestions.org/questions/linux-hardware-18/issue-with-qotom-q190p-it8768-serial-chip-4175614413/
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