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Laptop stopped recognizing Bluetooth hardware


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#1 matt7676

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Posted 29 September 2016 - 04:48 PM

I have a Lenovo T440s with Windows 10 up to date as of 9/29/16. I have been using Bluetooth headphones, but suddenly all the Bluetooth options from Settings and the Control Panel disappeared. When I go into Device Manager and show all hidden, everything under Bluetooth had Code 45 (Currently, this hardware device is not connected to the computer.) which is clearly not true. I tried updating the drivers, which didn't work. Then I tried uninstalling the drivers and reinstalling them with ones downloaded from the Lenovo website, but now no Bluetooth hardware shows up in Device Manager at all, even after restarting. 

 

This has happened twice before in the past two months; the first time it was fixed by updating Windows, the second time was fixed by running a Lenovo update, None of which are currently available. This leads me to believe it isn't a hardware problem.

 

Any ideas? Thanks.



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#2 JohnC_21

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Posted 29 September 2016 - 05:13 PM

If you download USBdeview are any Bluetooth devices listed?

 

http://www.nirsoft.net/utils/usb_devices_view.html



#3 matt7676

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Posted 29 September 2016 - 05:17 PM

No, but "Unknown USB Device (Device Descriptor Request Failed)"  was listed, but I doubt that is relevant.



#4 JohnC_21

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Posted 29 September 2016 - 05:34 PM

I was hoping to see some Bluetooth device. Perhaps removing the driver and rebooting would help. I'm not sure what the problem is but I bet it's has something to do with Windows 10 and not hardware related.

 

Edit: Is there a Fn key that turns bluetooth on and off?


Edited by JohnC_21, 29 September 2016 - 05:36 PM.


#5 matt7676

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Posted 29 September 2016 - 05:36 PM

I have already tried that, it didn't work.



#6 JohnC_21

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Posted 29 September 2016 - 05:47 PM

You can boot a live linux disk like Ubuntu 16.04 to check for a hardware problem. The bluetooth icon will appear in the top bar. Clicking on it will turn it on or off. Download the 64bit version. You may need to disable SecureBoot for Ubuntu 16.04. If you get bluetooth to work with Ubuntu then that would probably indicate a Windows 10 problem.

 

http://www.ubuntu.com/desktop

 

http://releases.ubuntu.com/16.04/


Edited by JohnC_21, 29 September 2016 - 05:48 PM.


#7 matt7676

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Posted 29 September 2016 - 05:49 PM

Good idea, I already have a live USB and will try this when I get the chance.



#8 matt7676

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Posted 29 September 2016 - 06:47 PM

Interestingly enough, Windows just updated and my Bluetooth is back.






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