External keyboard attached to USB-C monitor docked to MS Surface Pro 7 tablet not recognized for UEFI password prompt

[kq01526]

Hi,

Configuration:

• MS Surface Pro 7 tablet (with latest firmware) docked to Dell P2419HC USB-C monitor (with latest firmware) using USB-C cable for power+video+data.
• External USB keyboard and mouse connected to built-in USB hub of Dell P2419HC monitor.

Observation:

• USB Keyboard and mouse are working fine in UEFI firmware settings (where boot order etc. can be configured).
• USB Keyboard does not work in VeryCrypt UEFI bootloader password prompt.

Workaround:

• Since the MS Surface Pro 7 has a touchscreen, it's possible to enter the password on the VeryCrypt UEFI bootloader using the on-screen touch-keyboard :+1: .
• The detachable external physical MS Surface Type Cover attached via the magnetic connector also works on the VeraCrypt UEFI bootloader password prompt (but the external USB keyboard connected to the USB-C monitor's built-in hub does not).

Is this expected to not work or can it be fixed?

Regards

[kavsrf]

It is strange. Probably something is not configured. In general EFI does not have strict specification for drivers usage. I did not test MS surface pro. You can try to list usb devices via "dcscfg -ul".

btw. Try to use picture password if it is possible.