With the input provided above I did some more technical digging; steep learning curve so ;)
Seems like really the CH430G on the board in question has an issue with power supply. Connectivity works on a Mac perfect and on other different hardware (running Linux) it is not working. The later varies from kernel messages like above until no information at all that the device is plugged into USB (knowing that the particular hardware is very strict on providing power via USB only within the specification; also USB-disks fail without additional power supply). Another test with bypassing the CHG340 connecting the ESP8266 via "flying wiring" to a different UART (FT232) does work. The board (processor) itself is working fine. This is not a prove that the CHG430 on the board is broken but it shows it is not a driver issue from my point of view. Proposal to close this bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1915661 Title: WDH - CH340G USB UART not supported by ch341 driver in all chip revisions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1915661/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
