TB15 Dock Linux Support

Today I received the new TB15 dock. I'm disappointed to find it doesn't work on Linux, unlike the WD15, with which some Linux users have had some success.

My experience thus far:

- XPS 15 9550. Windows edition wiped with only Ubuntu installed.

- Ubuntu 15.10, Kernel 4.3.3

- Connecting the dock *does* charge the computer (yay!) but when restarting, BIOS gives a warning saying it's only charging at 60W instead of the recommended 130W. I have the 230W power brick attached to the dock, so I'm not sure if that message is accurate.

- Unfortunately, other than charging, the dock doesn't seem to do anything. No USB replication, headphones, ethernet, or any of the monitor ports work. Indeed, nothing is seen by the system at all. I'm a bit surprised as I expected firmware level support for the dock, such that at least the USB ports would work within even BIOS screens.

- Other USB-C adapters I've had great luck with: VGA, DisplayPort, and Ethernet dongles all work flawlessly.

- The one function that does work is the power button on the top of the dock. Pushing this button prompts Ubuntu to Sleep/Restart/Shutdown, as though I'd pressed the power key on the laptop.

What has been others' experiences with this dock and Linux?

UPDATE (July 26, 2016): Multiple users (including myself) have confirmed that the TB15 dock is now *mostly* working in Linux, including display ports, USB, and ethernet (with caveats). The key change seems to be upgrading the BIOS using "Dell XPS 15 9550 A10 System BIOS". For more info see this comment: http://en.community.dell.com/techcenter/os-applications/f/4613/p/19678284/20922879#20922879