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yoga370user
Paper Tape
Posts: 8
Registered: ‎05-25-2015
Location: CH
Views: 953
Message 1 of 6

Yoga 370 Bluetooth disconect at undocking Thunderbolt3 Dock

I use Yoga 370 Model 20JH002KMZ with Thunderbolt 3 Docking Station. Connected with USB-C Cable (Original).

I use external Wireless Bluetooth Keyboard (Lenovo KT-1255) and Logitech MX Master Mouser Bluetooth.
All Items are brandnew.

If I disconnect USB-C Dock-Cable, alle Bluetooth Devices (Keyboard and Mouse) are disconnecting and don't work.
Windows 10 shows both Devices as "Connected" and the Devices themselves are "blinking" (searching Notebook).

I tried this:

- Windows Bluetooth Device-Manager, disabled "windows can set device to energy save"

- Drivers are all up-to-date

- Drivers re-install

- Thunderbolt Firmware Update (up-to-date)

This all brings no solution. All Devices disconnecting if I disconnect the USB-C Docking.

Only solution I found is:

- FN-F10 multiple turning Bluetooth off and on in Windows.
- It needs often 3-4 turning off-on's until it works again.

 

What can I do?

Community SeniorMod
Community SeniorMod
Posts: 3,360
Registered: ‎12-01-2007
Location: US
Views: 922
Message 2 of 6

Re: Yoga 370 Bluetooth disconect at undocking Thunderbolt3 Dock

Hello,

 

What are the versions on the UEFI/BIOS firmware, the Bluetooth driver, and the Thunerbolt driver?

 

Regards,

 

Aryeh Goretsky

 



I am a volunteer and neither a Lenovo nor a Microsoft employee.

L380 YogaP72 (20MB-*)P50 (20EN-*)S230u (3347-4HU)T23 (2648-LU7)T42 (2378-R4U)T43p (2678-H7U)T61p (6459-CTO)W510 (4318-CTO)W530 (2441-4R3)W530 (2441-4R3)X100e (3508-CTO)X120e (0596-CTO)X220 (4286-CTO)X250 (20CM-*)Yoga 370

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yoga370user
Paper Tape
Posts: 8
Registered: ‎05-25-2015
Location: CH
Views: 916
Message 3 of 6

Re: Yoga 370 Bluetooth disconect at undocking Thunderbolt3 Dock

Hello, Versions are:

UEFI/BIOS:  R0HET33W (1.13)

Thunderbolt3:  NVM Firmware 4.04

Thunderbolt SoftwarePackage Version:   16.3.61.275

Thunderbolt Application:  16.3.61.14

Thunderbolt Serviceversion:   16.03.61.3

Thunderbolt Controller Driver: 16.3.61.2

Thunderbolt Generation:  Thunderbolt 3 (15BF)

Bluetooth Driver:  19.11.1639.649

yoga370user
Paper Tape
Posts: 8
Registered: ‎05-25-2015
Location: CH
Views: 826
Message 4 of 6

Re: Yoga 370 Bluetooth disconect at undocking Thunderbolt3 Dock

Update Version BIOS:

UEFI/BIOS: ROHT 35W (1.15)


After Installing the new BIOS, I de-installed all Bluetooth Drivers and -Devices.
Restart, and New Installation of them.

 

Result:

It's a little bit better - if I undock Thunderbolt3-Docking, the Bluetooth Mouse/Keyboard stayed connected in most of the cases.
If I do a undock and walk away without taking my BT Mouse/Keyboard with me and come back after one hour, I'm unable to reconnect them. Then I turn 3, 4, 5, 6 - times BT off and on with some time between switching off and on.

If I'm lucky BT devices come back - If I'm unlucky they don't and I have to restart complete Windows.

All devices are shown als "connected" but the aren't really. Keyboard and Mouse are blinking, who says "searching Notebook". (Switch "BT-Devices can see Notebook" is on).

Anyone have this same effects?

yoga370user
Paper Tape
Posts: 8
Registered: ‎05-25-2015
Location: CH
Views: 772
Message 5 of 6

Re: Yoga 370 Bluetooth disconect at undocking Thunderbolt3 Dock

Deactivation of "Windows can suspend this device for power saving" don't help me.
If I go away with my Yoga 370 and come back 1 hour later, BT-Mouse and -Keyboard don't work.

In Bluetooth-Settings the two Devices are "Paired" but not "Connected".

If I switch off and on Bluetooth on Yoga it works for some seconds, then again don't work.
I have to switch it 5 to 10 or more times off and on to get it work.

Safest way to get it work is to shutdown fully my Yoga and restart.


I have newest Drivers and new Keyboard and Mouse.

Does anyone have same Problems? Or is this a hardware issue?

TBI
Paper Tape
Posts: 2
Registered: ‎08-18-2017
Location: CH
Views: 722
Message 6 of 6

Re: Yoga 370 Bluetooth disconect at undocking Thunderbolt3 Dock

I have exactly the same Problem! Turning Bluetooth on/off helps for some seconds. Newstart holds a little bit longer but does not sove the problem.

 

Is there no solution for this; like this I can not work with mouse or keyboard....

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