05-02-2019 09:47 AM
I've connected my ThinkPad Carbon X1 6th generation 20HK to a ThinkPad Hybrid USB-C with USB-A Dock through my charging USB-C (Thunderbolt Compatible) port. The Dock worked pretty well out of the box -- charging, external display once logged in, USB ports, audio, etc.I can even use the keyboard and other USB ports at boot via the dock. I'm left to conclued that the dock simply doesn't support this and/or the laptop doesn't know how to deal with display over USB until additional drivers are loaded. Notwithstanding, does anyone have a way to get the dock display working from boot?
The rest of this post is debug info and things I've tried.
I connected an external monitor to the integrated laptop HDMI port as well as the dock HDMI port (simultaneously through different HDMI ports).
To reduce the amount of text, note that "Dock" means HDMI port on the dock whereas "HDMI" means the integrated HDMI port on the laptop. In each case, the monitor is configured to display either HDMI or the Dock, as appropriate. Also, reference to monitor means "external monitor" whereas any discussion of the laptop display will simply be "laptop".
The laptop boots fine but I don't see anything on from the Dock until I login to Linux (I'm dual booting Ubuntu 18.04 and Win10) or, alternatively, boot to Win10. Once logged in, I have no issues running from my laptop screen, the Dock, or HDMI.
On boot, I see the Lenovo splash screen followed by the GRUB2 display.
All of this functionality seems to have worked out of the box. Here's what I've tried to get the Dock to work starting at boot:
05-02-2019 10:04 AM
05-02-2019 10:56 AM - edited 05-02-2019 10:57 AM
About the USB devices on your dock: these are disabled in BIOS by default. On the Thunderbolt page of the BIOS Setup, there is an option 'Enable USB devices in pre-boot environment'. At least, there is on my X1 Carbon 5th gen. I have enabled that and can now use dock keyboard in BIOS and Grub.
Video: I sadly don't know. You got a dock with a DisplayLink chip, which sometimes has problems on Linux. The non-hybrid docks have no DisplayLink and have none of the display problems you describe.
05-02-2019 11:29 AM
05-02-2019 11:44 AM - edited 05-02-2019 11:46 AM
I use the "ThinkPad USB-C Dock". The dock is in the office so I can't check the numbers on the bottom until tomorrow, but the ordering code is 40A90090EU for the one with a European power cord bundled.
DisplayLink chips are necessary for docking with USB-A, hence your dock contains such a chip. I think any dock that has only a USB-C or Thunderbolt 3 plug, and no USB-A plug would do the job, even non-Lenovo ones probably work.
05-29-2019 05:01 AM - edited 05-29-2019 05:07 AM
The ThinkPad USB-C Dock is a new universal docking solution ensuring a productive workstation. Experience all your productivity needs including video, data, and wired network all while delivering continuous power to your laptop via a robust USB Type-C port.