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2 Posts

01-19-2018

RU

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T470s Bluetooth not working after wake up from Sleep mode

2018-01-19, 20:44 PM

Windows 10 Prof 64bit.

Now device manager shows: "Unknown USB Device (Device Descriptor Request Failed)."

Bluetooth worked correctly before entering the "sleep mode". Restart does not help. Defoult BIOS settings also does not help.

 

Does anyone know how to solve the problem?

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835 Posts

01-04-2018

US

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Re: T470s Bluetooth not working after wake up from Sleep mode

2018-01-20, 5:20 AM

I'm going to give you a few possible solutions, which if they don't work your last resort will have to be reinstalling Windows. First off, trying going to device manager and disabling the device, then re-enable. If possible, try to update the driver from there. Go to power options and then "Choose what the power button does" then go to "Change settings that are currently unavailable" and turn off fast startup. 

 

If all else fails, back up data and reinstall windows.

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2 Posts

01-19-2018

RU

5 Signins

107 Page Views

  • Posts: 2
  • Registered: ‎01-19-2018
  • Location: RU
  • Views: 107
  • Message 3 of 3

Re: T470s Bluetooth not working after wake up from Sleep mode

2018-01-20, 12:43 PM

Thanks!
The problem is resolved!
Disabling/re-enable the device did not help.
Bluetooth started working after reinstalling Windows.
But! After 5 minutes the problem repeated - in Device Manager the Bluetooth icon disappeared, and again there was an icon "Unknown USB Device" in "USB controllers" tree
After that disabling/re-enable the "Unknown USB Device" in Device Manager shows "Bluetooth tree" with one problem item - "Intel Wireless Bluetooth". Item status was - STATUS_DEVICE_POWER_FAILURE. 

I updated the driver for this item and the problem resolved!
Thank you so much!

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