On Fri, Sep 18, 2020 at 06:54:17AM -0400, Andy KN4UCL wrote: > Hello Johan - resending without disclaimer :-) Thanks. Also try sending without HTML so that your messages reach the mailing lists (e.g. gmail's plaintext option). > I emailed Greg and via automated email indicated I should post my > question here. I've added linux-usb on CC as well. > I am trying to get some legacy EdgePort/4 and 8 devices to work on > Linux using Raspberry Pi OS. > > I notice in the kernel.org notes, compatibility with Edgeport seems to > be a good possibility. > > Can you advise? I get "cannot send clear loopback command" messages > in dmesg and these seem to be directly from the driver code I found > while googling. I assume these errors prevent the serial connection > from starting up. Devices seem to behave fine under Windows 10 (if > that's any kind of validation.) First, what are the VID and PIDs for these devices? Perhaps you can include the full output of "lsusb -v" for both types as well for completeness. > I do not have any problems with several Keyspan USA-49W devices which > are also referenced in the Compatibility section in the notes, so I > think my Linux machine is good. > > Apologies - I am not a Linux expert, just an end user. > > Any guidance or tips would be appreciated! > > Thanks in advance Johan