Hmm. I have a Dell XPS 15 7590. Try JACK with the firewire drivers. Devices attached to the Thunderbolt port may require permissions to connect to the port. But I have a Dell Thunderbolt 3 dock (need for Ethernet and more USB ports), that may have required the permissions. There's a settings area in the Dell BIOS that controls Thunderbolt permissions. I've heard that this chain of adapters works: Firewire device to Apple's FW to Thunderbolt 2 adaptor, then to a Thunderbolt 2 to Thunderbolt 3 adapter. Someone (not me) on the list mentioned that they had it working some time ago. When I got it, I had read that Ubuntu 19 supported the Thunderbolt dock but 18 didn't. I tried both, neither worked. 18 crashed when installing, 19 installed but with no network connection. This was all before Ubuntu 20 was around. Debian 10 installed and works fine. There's some Linux commandline tools for managing Thunderbolt devices. You might want to add them. I can check later, I think I still have the relevant pages bookmarked on my laptop. On July 5, 2020 8:48:57 AM HST, di.heumo(a)gmail.com wrote: --- David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com Sent from my Android device with F/LOSS K-9 Mail.