PSION II Comms Link/USB ======================= I do have this thing [1] and my experiences on Linux are a bit mixed. On a GPD Pocket I finally have made a connection but then it was "disconnected". The GPD has issues with USB power though. And a powered USB hub probably just added another level of complexity. At least the device was visible in the "Dmesg" output. On the Blackbird (Fedora 31/ppc64le) I have had no luck - I has not able to see it at all. I have no idea if it was influenced by fact that an another USB-Serial device was already connected. I really should not use these modern things and use the real serial link with an already tested USB-serial adapter instead... References: [1] https://www.gossuin.be/index.php/psion-organiser-ii-comms-link-usb