Hi Jack, I believe that driver has only been tested with the FT232AM, which has not been manufactured for several years now. Ashley (cc'd) implemented it as an intern project in 2013: https://github.com/tianocore/edk2/commit/3f1484f There probably needs to be some work done to get it running with newer FTDI chips like the FT232RL. Thanks, Nate From: devel@edk2.groups.io On Behalf Of Little, Jack Sent: Wednesday, May 26, 2021 10:21 AM To: devel@edk2.groups.io Subject: [edk2-devel] FtdiUsbSerialDxe Hi, Are there any known bugs with [edk2-stable202002] when using the FtdiUsbSerialDxe driver? I am seeing errors during initialization when TerminalDriverBindingStart() tries to reset the FTDI device and gets EFI_DEVICE_ERROR. Thanks, Jack