EB x360 1030 G3 Recovery Key at each reboot when usb c connected

[dingoant]

Hi the community,

I have an Elitebook x360 1030 G3 with Windows 10 64. At each reboot, Bitlocker is asking for the recovery Key. This happens only if I have an USB-C adaptator. This USB-C adaptator is connected to a VGA display and an USB Keyboard. If I shut the computer down without the USB-C connected, it will not ask the key at the reboot.

I tried to unable bitlocker and enable it back. When it is unabled, no recovery key is requested.

I updated the laptop to the latest Bios (v1.12).

I cleared the TPM in the Bios without any changes. 

How can I configure the TPM to do not take into account the usb?

Thank you for your help

[WAWood]

@dingoant 

Don't understand your configuration.  Are you saying that you have a USB-C hub connected to the laptop and then, one USB cord from the hub to a an external monitor through VGA connection and another cord from the hub to a keyboard?

I've run into this same situation but only when I connect a USB stick that has been encrypted by BitLocker.  So, it sounds like BitLocker thinks the VGA connection is to an encrypted device -- and I don't know any way to tell it different.

[dingoant]

Hi WAWood,

I have one of these USB-C adaptors that has one USB-A port used for the keyboard, one USB-C, one VGA used for the screen and one HDMI.

To me TPM is detecting a change in the USB configuration and asks Bitlocker to request the recovery key. 

[WAWood]

@dingoant 

OK, understand -- but do you then have to enter the key, or can you just close that and move on?

[dingoant]

I have to entre the recovery key. In the past I managed to pass the bit locker screen after multiple reboots without any device connected to the laptop. 

[WAWood]

@dingoant 

OK, then this might work.  I did this for my encrypted USB stick and do not get the key prompt on this PC anymore.  

Details about getting BitLocker to automatically unlock your drive:  https://www.isumsoft.com/windows-10/enable-or-disable-bitlocker-auto-unlock-for-drive.html#:~:text=%...

[dingoant]

Hi WAWood,

Unfortunatelly it doesn't work as the USB hub is not recognised as a drive. It has thus no letter I can select to activate the auto unlock. Unless I have to activate the auto unlock on my C: Drive

[WAWood]

@dingoant 

You said before you had to enter the key to continue -- but I asked the wrong question.  If you had to enter the key to continue with using C:, then changing that should stop the key prompts.  But if you can use C: without entering the key, then you should b be able to just ignore the key prompt.

[dingoant]

Hi WAWood,

I can't ignore the prompt. The C: cannot be used without entering the key.

I tried to activate the auto unlock on the c: but it is refused as it is the OS drive. 

[WAWood]

@dingoant 

Not good news -- as something is then wrong with BitLocker. 

My new laptop came with BitLocker preloaded and thus, I did not have to set auto-unlock for the C: drive.  It should be set to that automatically, and if it is not, I don't know how to tell you to set it, if it won't let you.  You would have to do some research online about BitLocker to see if there is a workaround.

Sorry I can't help further.