To verify: USB/serial name patterns to check with "port=auto"

[jimklimov]

/dev/hidraw0 per #1012
/dev/ttyXRUSB0 per #1017 and #954

[biergaizi]

/dev/ttyXRUSB0 per #1017 and #954

I think NUT should not assume there's any special serial port name patterns. For the Linux kernel, the rule is that all serial devices must use generic names such as ttyACM and ttyUSB. We can't just make assumptions from the device name. To me, I doubt whether automatic serial port configuration is really a good idea at all (since we should not make assumption based on device name, so it means other very convoluted methods of detection must be used, e.g. checking which kernel module is binded to which USB device).

The name /dev/ttyXRUSB0 reported by UPS2000 users is a nonstandard name in a out-of-tree unofficial driver, likely bundled in a distro downstream kernel. Since Linux 5.1It has already been replaced by the upstream driver, which uses a generic name.