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16 Posts

12-15-2018

FI

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Thunderbolt3 dock gen2 doesn't work after laptop wakes from sleep

2019-02-16, 16:41 PM

I just got a brand new Lenovo Thunderbolt3 Dock Gen2 to use with my lovely T480.

 

The dock works ok but I have a big problem everytime I put my laptop to sleep at the end of the day. In the next day when I wake my machine (by pressing the power button on the Gen2 dock) my system wakes up fine but my external keyboard doesn't work.

I have to reboot my laptop to get the keyboard working again. Anyone have dealt with the same problem with Lenovos docks? All drivers and firmwares are installed from Lenovos site and the Thunderbolt3 software (the older app not the new UWP) sees the dock fine.

 

Tried to unplug and plug back the USB keyboard but still it doesn't recognize or work. 

 It seems once the laptop goes to sleep, all of the docks USB ports stop working. Tried to plug the keyboard to other usb-a ports on the dock and none of them make the keyboard to wake up.

 

Only way to get the ports on the dock working is a reboot of the laptop.

 

I am propably going to take the dock back to the retailer tomorrow as I have exhausted all my knowledge on this and whatever I do it just wont work.

 

Now, what should I take as a replacement. The older version of the Thunderbolt3 dock or the new TB3 Workstation dock?

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16 Posts

12-15-2018

FI

37 Signins

244 Page Views

  • Posts: 16
  • Registered: ‎12-15-2018
  • Location: FI
  • Views: 244
  • Message 2 of 4

Re: Thunderbolt3 dock gen2 doesn't work after laptop wakes from sleep

2019-02-17, 12:37 PM

Ok, i kind of got this to work. It seems I need two sleep cycles to get the ports working on the dock.

 

So I need to wake the laptop, then put it back to sleep and then once again wake it up, and after that all the ports work normally again.

 

So either this is a firmware problem in the dock or a problem in the laptop drivers/docks drivers?

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641 Posts

07-20-2009

US

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Re: Thunderbolt3 dock gen2 doesn't work after laptop wakes from sleep

2020-02-12, 14:40 PM

I have the exact same symptoms on the TBT3 dock Gen1 connected to an X1 Tablet 3rd gen. FWIW, for me my external KB and mouse also come back to life if I unplug and reconnect the TB cable to the tablet. 

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19 Posts

04-12-2020

FR

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  • Posts: 19
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Re:Thunderbolt3 dock gen2 doesn't work after laptop wakes from sleep

2020-04-18, 13:54 PM

Same problem here with Thunderbolt 3 Dock Gen 2 (40AN) and Ideapad S740 (81RS) although they're fully compatible according to https://accessorysmartfind.lenovo.com/#/products/40AN0135EU

 

 

Seems like Lenovo does not have the same definition of "compatibility" than everyone.

 

Second monitor does wake up when using an HP latop connected to the same Lenovo dock. No comment.

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