I'm using Pyserial to manage serial communication over USB (FTDI drivers) to a Dynamixel U2D2 controller. Using the bookworm 64-bit OS on a Pi4B works perfectly, but on a Pi5, the serial.Serial(port, baudrate, timeout) call hangs and eventually returns with Error 5 I/O error. This occurs irrespective of which USB port is used on the Pi5. The drivers and permissions are identical between devices, and in fact, even swapping the SD card with OS image between the Pi4B and Pi5 yields the same result. Given the USB ports function for keyboard and SD card burner, this doesn't seem to be a hardware issue. I'm out of things to try and hoping someone else has encountered and solved this issue. Thanks!
Statistics: Posted by mwweiss — Thu Apr 03, 2025 2:14 pm