mjhjmtu

Setup:
- Dell XPS 15 9560

- 4.18 Arch Linux w/ Gnome 3.30 on Xorg

- Intel graphics (NVidia 1050 discrete graphics completely disabled)

Original plan was to connect two 21" display to the TB16 dock. Problem is: my system just does not recognize it. When plugged in via the USB-C display port with a USB type C Thunderbolt .5M cable, nothing works except:

• VGA pass-through to connect an old external VGA display.


• Power supply via TB16


• The sleep button on top of the TB16 box

# lsusb -v produces this content. In short: hub detected ( idVendor="1d6b", idProduct="0002" ) but its different hardware interfaces aren't recognized.

I have read tons of posts out there + possibly all the Arch wikis on Thunderbolt, and XPS machine including XPS 13 and 15. I tried a number of things, rebooting with the dock connected or not.

• Boot options include NO pre-boot and NO boot-module support.


• TB security mode is set to "User"

I have bolt-git and tbt installed from AUR. However nothing shows in Gnome 3.30's Thunderbolt settings section. The section is there but shows the message "No thunderbolt support".

$ sudo tbtadm devices
Exception: boost::filesystem::directory_iterator::construct: No such file or directory: "/sys/bus/thunderbolt/devices"
$ sudo tbtadm topology
Exception: boost::filesystem::directory_iterator::construct: No such file or directory: "/sys/bus/thunderbolt/devices"
$ fwupdmgr get-devices

yielded this.

$ fwupdmgr refresh; fwupdmgr get-updates; sudo fwupdmgr update

went smoothly, so I have all updatable FW up to date at posting time.

:/ ... Any troubleshooting help most welcome. Cheers.