Thank you for joining the community.
To investigate better on the case could you provide us with the following information?
Can you provide us with the Dxdiag report following these steps?
- Use the win logo key +R
- Type DxDiag then “OK”
- Use the “save all the information” option
- Save the file to your desktop
- Please attach the .txt file to the thread
What kind of video cable is used for the connection?
What is the model of the display?
Can you provide us with the Intel® System Support Utility for Windows* report? Please attach
the result to the thread
I'm traveling and can't access the display this week. I'll be back next week and try it out again and get the information then.
OK, here is the information.
The laptop is a Lenovo Yoga 920 model 131KB with 16GB Ram and 4K
touchscreen. It has two USB-C ports with Thunderbolt 3 under a Thunderbolt
I have one ThunderBolt 3 port connected to a StarTech.com Thunderbolt 3 to
Thunderbolt converter TBT3TBTADAP which is connected to an Apple Thunderbolt
Display (which has an internal Thunderbolt hub) using only the display's
cable. The same behaviour occurs using the Apple Thunderbolt 3 to
Thunderbolt 2 converter.
Apple is bad at putting model numbers on their devices, but there has only
been one version of the display as far as I know, model number A1407.
I have attached DxDiag and SSU output with the display connected.
When I boot with the display attached or plug the display in I get a pop-up
titled Approve Thunderbolt Devices, with Apple Inc., Thunderbolt Display
listed. If I select Always Connect and OK the pop-up goes away but the
device is not connected. It does show up in Attached Thunderbolt Devices in
the Thunderbolt Software application, but not in Manage Approved Thunderbolt
Thank you for the information provided
We can start by verifying that the thunderbolt drivers are up to date, you have motioned that you are running 220.127.116.11 on the manufacturer site you can find the version 18.104.22.168 here is the link update the drivers
Does the system work if you connect it to another Thunderbolt display?
I went to that site and downloaded
Intel Thunderbolt Driver for Windows 10 (64-bit) - Yoga 920-13IKB, Yoga 920-13IKB Glass 22.214.171.124 22 Jan 2018
I ran the downloaded file and got a window saying
Setup - Intel Thunderbolt Driver
This will install Intel Thunderbolt Driver version 126.96.36.199 on your computer
This then gave a Destination Location of
which seems strange, but I accepted it.
I then ran the program what was suggested and got to the device-driver installation wizard. It ran and appeared to work fine, but the completion window said that it was installing drivers named
Intel(R) Corporation (nhi) System (06/06/2017 188.8.131.52)
Intel(R) Corporation (TbtMpDrv) Net (05/14/2017 184.108.40.206)
I rebooted, but the device behaviour did not change and the driver for the Thunderbolt(TM) Controller - 15D2 still has version 220.127.116.11
Either this is the most recent driver or the installer on the Lenovo site is somehow broken.
I only have access to the one kind of display, but both of them act the same.
My colleague has a Dell laptop with a Thunderbolt port, and the display works fine on that laptop. The Dell laptop has an older Thunderbolt chip and older drivers.