我注册了 2 个指纹，但它们似乎没有显示或起作用。
以下是lsusb我的第四代 ThinkPad X1 Yoga 的指纹读取器：
Bus 001 Device 017: ID 06cb:00bd Synaptics, Inc. Prometheus MIS Touch Fingerprint Reader
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 16
bDeviceProtocol 255
bMaxPacketSize0 8
idVendor 0x06cb Synaptics, Inc.
idProduct 0x00bd Prometheus MIS Touch Fingerprint Reader
bcdDevice 0.00
iManufacturer 0
iProduct 0
iSerial 1 2d92cfb68025
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0027
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 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
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:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 4
Device Status: 0x0000
(Bus Powered)
$ sudo ls -l /var/lib/fprint/$USER/
total 0
drwx------ 1 root root 24 Jan 30 22:52 synaptics
$ journalctl -u fprintd.service
Jan 30 22:52:21 Kuroneko-ThinkPadX1Yoga4th systemd[1]: Starting Fingerprint Authentication Daemon...
Jan 30 22:52:22 Kuroneko-ThinkPadX1Yoga4th systemd[1]: Started Fingerprint Authentication Daemon.
Jan 30 22:52:25 Kuroneko-ThinkPadX1Yoga4th fprintd[104093]: Authorization denied to :1.1537 to call method 'Release' for device 'Synaptics Sensors': Device was not claimed before use
Jan 30 22:53:49 Kuroneko-ThinkPadX1Yoga4th fprintd[104093]: Authorization denied to :1.1537 to call method 'EnrollStop' for device 'Synaptics Sensors': Device was not claimed before use
Jan 30 22:53:49 Kuroneko-ThinkPadX1Yoga4th fprintd[104093]: Authorization denied to :1.1537 to call method 'Release' for device 'Synaptics Sensors': Device was not claimed before use
Jan 30 22:54:19 Kuroneko-ThinkPadX1Yoga4th systemd[1]: fprintd.service: Deactivated successfully.