It seems that the Thunderbolt 3 to 2 adapter is not supported:
https://bugzilla.kernel.org/show_bug.cgi?id=189731
** Bug watch added: Linux Kernel Bug Tracker #189731
https://bugzilla.kernel.org/show_bug.cgi?id=189731
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$ sudo modprobe firewire_ohci
$ lsmod | grep firewire
firewire_ohci 40960 0
firewire_core 65536 1 firewire_ohci
crc_itu_t 16384 1 firewire_core
There is no output for 'lspci | grep -i FireWire'
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Public bug reported:
The adapter is connected through an Apple Thunderbolt 3 to Thunderbolt 2
adapter. Ubuntu seems not to recognize the Firewire adapter.
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:Ubuntu 17.04
Release:17.04
Codename: zesty
uname -r