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[FIX] Unknown USB device (Device Descriptor Request Failed) Fastboot Windows 10

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By BoBo Rich, Junior Member on 8th May 2016, 09:11 PM
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23rd August 2018, 08:11 AM |#11  
o-l-a-v's Avatar
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Thanks! I have this problem with my Shield TV Pro, will try this after work.
Here's some PowerShell code for doing the registry editing, if anyone is interested.

#Requires -RunAsAdministrator
[string] $Path = 'HKLM:\SYSTEM\CurrentControlSet\Control\usbflags\0BB40FF00100'
[string] $Name = 'SkipBOSDescriptorQuery'

if ($false) {
    # Create the path if not exist
    if (-not(Test-Path -Path $Path)){New-Item -Path $Path -ItemType 'Directory'}

    # Set "SkipBOSDescriptorQuery" to $true
    Set-ItemProperty -Path $Path -Name $Name -Value 1 -Type 'DWord'

    # Set "SkipBOSDescriptorQuery" to $false
    Set-ItemProperty -Path $Path -Name $Name -Value 0 -Type 'DWord'

    # Remove item
    Remove-ItemProperty -Path $Path -Name $Name

    # Remove path and item(s)
    Remove-Item -Path $Path -Recurse -Force
Edit: This did not work for my Shield TV 2015 Pro unfortunately..
26th February 2019, 06:26 PM |#12  
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The error changes to "Port Reset failed". Error code remains the same 43. In my case I am trying to connect an LG G3 D858HK. I have tried many different cabels but no solution.
26th June 2019, 11:53 PM |#13  
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Unknown usb device error Motorola
28th June 2019, 01:23 AM |#14  
texas7412's Avatar
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Doesn't work on lg v20... Haven't been able to fix this issue for a while now..
24th August 2019, 10:20 PM |#15  
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Thanks for the info mate !
The registry key worked just great in my Windows 10 x64 computer at home and at my work laptop.
I have a Huawei P9 mobile Device.
Had this issue and nothing i tried seemed to work.
Your key did.

Thanks again !!!
9th October 2019, 12:36 PM |#16  
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V20 Method prior to attempt....
@texas### whos still having trouble with a V20 stuck in the firmware screen ( like me) and I have a theory so I'm posting this prior to attempting it but someone please let me know if I have this wrong.
I read this post on the first page of the thread by someone whos name I've forgotten now (sorry) but they wrote....

--------------- edit: Hrm. Seems to have cropped up again. Time to continue the battle *sigh*
edit 2: Got it! Thankfully I had a Win7 laptop that I was able to fire up. The HTC Aria's fastboot hardware ID is "USB\VID_0BB4&PID_0FFF&REV_0100" which means the vvvvpppprrrr is 0BB40FFF0100. So follow the instructions above but using the key of 0BB40FFF0100 -----------------------

and based on this --- my V20 hardware ID reads "USB\VID_0000&PID_0002\5&2BF451F8&0&2" or rather the instance path does and using this I should be able to correct the value of the binary string to fit this corresponding ID for the VVVVPPPPRRRR correct? so value will be "0000000252BF451f02" ????
Im making the key and binary value now and I'll repost results later
I'm so invested in this phone both in time and sheer ignorance of what else I can do to get this damn thing out of the firmware screen.
* I've tried loading the "LG drivers from both LG composite device and VZW versions" to no avail.

*On a side note, tapping the power button brings up a "download mode" sub screen where is searches for wifi connections and after finding mine I went ahead and tried to connect 1- normally 2- removing my wifi password 3- using the WPS button to connect, all of which ended in "connection failed" so can someone explain the actual purpose of this option if there is no way to connect? or am I finding the wrong signal so to speak>?
I'll gladly post all of my results or screen shots, (all failed so far) using ADB, uppercut, LGUP, odin, placing TOT files on the SD card, plus a few absolutely embarrassing methods but had to try something.
Please tell me someone knows a way out of this
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