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5 Posts

04-12-2018

DE

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Thunderbolt Controller not connected

2018-10-29, 15:05 PM

Since January I tried to fix my Thunderbolt 3 Dock (40AC) to get it work together with my X1 Yoga Gen2 (20JE). It works nicely in the first months. Lenovo sends me a second dock, nothing changed. Today Lenovo changed my mother board, nothing changed. I changed all cables and tried any hint from support forums and our internal IT department. So different windows installation binaries was tested and all drivers as well as BIOS are the newest versions.

 

Perhaps someone here has an idea what that means if the device manager in Windows says that the device (Thunderbolt Controller 15D2) is not connected to the computer and it is hidden. The device is not hidden and connected, that includes also then the ThunderBolt Software shows all two ports, only during the installation of the driver software or the update tool. That is really crazy. I think this is the main issue. Please check the attached screenshot. Any hint would be helpful. Thank you.

 

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1 Posts

01-05-2019

DK

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Re: Thunderbolt Controller not connected

2019-01-05, 22:26 PM

I have a similar issue with my P1. Did you ever resolve the issue?

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5 Posts

04-12-2018

DE

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Re: Thunderbolt Controller not connected

2019-01-19, 9:58 AM

Unfortunately not. I changed the dock, the motherboard, the usb-c cable, installed all the new drivers, play with different Windows images, nothing helps.

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10 Posts

04-25-2019

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Re: Thunderbolt Controller not connected

2019-04-30, 23:22 PM

I am experiencing a very similar issue. I have an X1 Carbon Type 20KH connected to a TB3 Dock Gen 2 Type 40AN. A battery reset temporarily fixes the issue, but it keeps coming back. 

 

I have an external monitor, ethernet, mouse, and keyboard connected to the dock. After some time, the TB Controller becomes "disconnected" and is hidden in Device Manager. The external monitor is still connected and works, but everything else is disconnected. I have tried connecting just the dock with no other inputs and it seems to work fine. Once I connect anything, including just ethernet, the issue repeats. 

 

I have tried installing and reinstalling the TB device and updating the firmware and drivers. I also downloaded and installed the latest TB3 Dock Gen 2 driver v1.001.1 and firmware v3.1.53 from the Lenovo support page. Automatic Driver update and Lenovo System Update seems like everything is updated. 

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6016 Posts

10-29-2009

NC

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Re: Thunderbolt Controller not connected

2019-05-02, 13:52 PM

What your screenshot shows is normal when you don't have any Thunderbolt device attached.  Basically, the unused Thunderbolt controller turns off to save power.  When you attach a Thunderbolt device, it should automatically turn on.  (This behavior is unique to Intel core 7th-gen models like X1 Yoga 2nd, X1 Carbon 5th, T470, etc)

 

You can also force it to turn on by using the detect tool which comes from the firmware update package.  For your convenience, I attached it here.  Unzip it, open a command prompt as administrator, and then run detect1810.exe.  After it runs, you should see the Thunderbolt controller in Device Manager (and not hidden).

 

https://1drv.ms/u/s!ApXWjQB7_a1bhf5ysd4qXA-9Aigm2g

 

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10 Posts

04-25-2019

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Re: Thunderbolt Controller not connected

2019-05-03, 15:30 PM

Thanks for the reply someotherguy. I tried the detect tool to force the controller on, but generated an error. Screenshot attached. 

 

The only temporary solution to turn the TB controller back on is shutdown and battery reset. I tried reinstalling the driver (v 17.4.78.21), TB software and firmware. The issue continues to occur. Though something strange I noticed is that even after the TB controller disconnects, my external monitor continues to work fine. Windows display settings cannot detect the monitor but I can still use it like normal. So the dock/controller is still working in some way. 

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10-29-2009

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Re: Thunderbolt Controller not connected

2019-05-03, 15:34 PM

What happens if you run the detect tool after shutdown and battery reset?  I'd really like to figure out what Thunderbolt firmware version is installed and the detect too will tell you that (if you are able to get it to work)

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04-25-2019

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Re: Thunderbolt Controller not connected

2019-05-03, 17:40 PM

After the reset and the TB controller is connected again, there seems to be no issue with the detect tool (screenshot attached). The NVM firmware version is 40.00. The window closes shortly after "Capturing Current Build ID..."

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Re: Thunderbolt Controller not connected

2019-05-03, 17:44 PM

I need to see the "current build ID", normally it would be printed out in the command prompt window.  How exactly did you run it?  Can you please run detect1810.exe from the command prompt (as opposed to double-clicking on it)?

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04-25-2019

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Re: Thunderbolt Controller not connected

2019-05-03, 17:52 PM

I ran it from command prompt. Once the command is entered, a separate window opens, which eventually closes after it is done. Nothing is saved to the original command prompt window. 

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Re: Thunderbolt Controller not connected

2019-05-03, 17:57 PM

Your latest screenshot shows a command prompt running as a user.  Please open the command prompt as an administrator (this means, type "command" into the start menu, right-click, run as administrator) and then run the detect tool from that administrator command prompt.

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04-25-2019

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Re: Thunderbolt Controller not connected

2019-05-03, 18:13 PM
Sorry about that. I reran as an admin and the same issue occurs. I try to rerun but it seems to get stuck on "Capturing Current NVM version..."
Also, it seems after running the detect tool, the TB controller disconnects so I have to battery reset every time I run it.
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Re: Thunderbolt Controller not connected

2019-05-03, 18:30 PM

This is strange.  Please reboot and press F1 to enter BIOS setup.  Config -> Thunderbolt -> Thunderbolt BIOS Assist Mode.  Is it Disabled or Enabled?

 

If this is Disabled, please set it to Enabled, then press F10 to save and exit.  Go back into BIOS setup, change it back to Disabled, and then F10 to save and exit.  See if this toggling of the setting fixes the problem.

 

If this is Enabled, please set it to Disabled, then press F10 to save and exit.  

 

 

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04-25-2019

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  • Message 14 of 18

Re: Thunderbolt Controller not connected

2019-05-03, 20:14 PM

I think I saw you post this on a different thread for Thunderbolt issues. BIOS assist mode was Disabled. I toggled the setting. I still can't get the Build version from the detect tool. 

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Re: Thunderbolt Controller not connected

2019-05-03, 20:19 PM

 wrote:

I think I saw you post this on a different thread for Thunderbolt issues. BIOS assist mode was Disabled. I toggled the setting. I still can't get the Build version from the detect tool. 


I just want to confirm that you toggled the setting and saved/rebooted in between and saw the message like "Configuring Thunderbolt Controller... Please do not power off" at the red Lenovo logo screen.  And the detect tool still doesn't work, and you still have the original problem where you have to shutdown and do a battery reset?  If so, it's really starting to sound like a hardware problem.

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04-25-2019

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  • Message 16 of 18

Re: Thunderbolt Controller not connected

2019-05-03, 20:25 PM

Yes, between switching the setting, I saw the "Configuring Thunderbolt Controller" message. I tried the detect tool several more times. I can see the build version flash in the window before it closes. Too fast to copy it down or get a screenshot. And the controller seems to disconnect more frequently so I am agree this seems to be a hardware issue. I'll try a couple more times and let you know if anything changes. Thanks for your help. 

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6016 Posts

10-29-2009

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Re: Thunderbolt Controller not connected

2019-05-03, 23:05 PM

Have you tried running the thunderbolt firmware update tool (from the support website) after doing a shutdown and battery reset?  Maybe reflashing the firmware could help.  I'm not sure, I'm just guessing at this point, but I don't think it could hurt anything.

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  • Message 18 of 18

Re: Thunderbolt Controller not connected

2019-05-13, 13:29 PM
Yeah, I basically tried all combinations of resets and firmware/driver updates. At this point, my only option is to send it in for repair. Thanks for all your help though.
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