Support request: 06cb:00b7 (HP EliteBook 840 G6) — "No matching devices found

[haternbasil-hash]

System info:

Laptop: HP EliteBook 840 G6
OS: Linux Mint (Ubuntu-based)
Installed via: ppa:uunicorn/open-fprintd

Device:
$ lsusb | grep -i fingerprint
Bus 001 Device 002: ID 06cb:00b7 Synaptics, Inc. Fingerprint reader [HP G6]
Problem:
python3-validity.service fails to start with No matching devices found — device ID 06cb:00b7 doesn't appear to be in the driver's known device list.
Process: ExecStart=/usr/lib/python-validity/dbus-service --debug (code=exited, status=1/FAILURE)
Traceback:
File "/usr/lib/python3/dist-packages/validitysensor/init.py", line 49, in open
usb.open()
File "/usr/lib/python3/dist-packages/validitysensor/usb.py", line 50, in open
self.open_dev(dev)
File "/usr/lib/python3/dist-packages/validitysensor/usb.py", line 62, in open_dev
raise Exception('No matching devices found')
Exception: No matching devices found
fprintd-list $USER also returns "No devices available."
Request:
Could support for 06cb:00b7 be added, similar to the existing 06cb:009a support? Happy to provide lsusb -v -d 06cb:00b7 output, run test firmware/patches, or help debug further if that's useful — this seems to be the same HP G6-family sensor reported in a few other closed/open issues for this laptop generation.

Bus 001 Device 002: ID 06cb:00b7 Synaptics, Inc. Fingerprint reader [HP G6]
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 16 [unknown]
bDeviceProtocol 255
bMaxPacketSize0 8
idVendor 0x06cb Synaptics, Inc.
idProduct 0x00b7 Fingerprint reader [HP G6]
bcdDevice 1.64
iManufacturer 0
iProduct 0
iSerial 1 7d9c9486053a
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0035
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 5
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:

[igorpupkinable]

Here is how to fix it https://dev.to/devtochukwu/how-i-got-my-hp-fingerprint-sensor-working-on-linux-and-why-nobody-else-had-3n2a

[igorpupkinable]

Duplicate of #225
Ongoing work in PRs #256 and #270