Thank you for the reply. The port & data cable were verified & ruled out. That left the device (pcb & chip) and my system config (drivers). Learning more about "lsusb" & its low level scanning capabilities independent of drivers has really been a big help troubleshooting. Thank you for confirming th...

Additional info...I'm not sure how to interpret this output: colddog1964@penguin:/sys/bus/usb/drivers$ ls -l total 0 drwxr-xr-x 2 nobody nogroup 0 Dec 16 13:43 cdc_acm drwxr-xr-x 2 nobody nogroup 0 Dec 16 13:43 ch341 drwxr-xr-x 2 nobody nogroup 0 Dec 16 13:43 cp210x drwxr-xr-x 2 nobody nogroup 0 Dec...

ESP_Sprite, Thank you for your reply. I am a newbie here, my HP Chromebook runs Debian 10. I am aware of CDC-ACM driver through my web searches but I am unable to locate driver / module file on my system? WCH CH9102F data sheet states the CH9102F is fully compliant to the CDC Standard and will work ...

Hello All, I have a WCH CH9102F USB to UART bridge controller that is not seen by Linux 5.4.1. The controller is on a TTGO T display dev board with an ESP32-DOWDQ6-V3 and a USB type-C connector. The same dev board with a CP 2102 connects to my stock build Linux Chromebook without the need to install...