[fp_dev_img_capture] unrecognised return code -74

[gunferzs]

I followed all the instructions on github and I get error -74. And device is unrecognize all fprint.
lsusb:

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 008: ID 1038:1280 SteelSeries ApS
Bus 001 Device 009: ID 1038:1283 SteelSeries ApS
Bus 001 Device 007: ID 0451:2036 Texas Instruments, Inc. TUSB2036 Hub
Bus 001 Device 006: ID 04f3:0c1a Elan Microelectronics Corp.
Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 004: ID 1bcf:2cb7 Sunplus Innovation Technology Inc.
Bus 001 Device 003: ID 8087:0a2b Intel Corp.
Bus 001 Device 002: ID 062a:415e Creative Labs
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Call sudo example/img-capture:

fp:debug [fp_init]
fp:debug [register_driver] registered driver upekts
fp:debug [register_driver] registered driver aes3500
fp:debug [register_driver] registered driver aes4000
fp:debug [register_driver] registered driver aes2501
fp:debug [register_driver] registered driver aes2550
fp:debug [register_driver] registered driver uru4000
fp:debug [register_driver] registered driver vcom5s
fp:debug [register_driver] registered driver upeksonly
fp:debug [register_driver] registered driver aes1610
fp:debug [register_driver] registered driver aes1660
fp:debug [register_driver] registered driver aes2660
fp:debug [register_driver] registered driver vfs101
fp:debug [register_driver] registered driver vfs301
fp:debug [register_driver] registered driver vfs5011
fp:debug [register_driver] registered driver upektc
fp:debug [register_driver] registered driver upektc_img
fp:debug [register_driver] registered driver etes603
fp:debug [register_driver] registered driver vfs0050
fp:debug [register_driver] registered driver elan
fp:debug [find_supporting_driver] driver elan supports USB device 04f3:0c1a
fp:debug [find_supporting_driver] selected driver elan supports USB device 04f3:0c1a
Found device claimed by ElanTech Fingerprint Sensor driver
sync:debug [fp_dev_open]
async:debug [fp_async_dev_open]
elan:debug [dev_init]
async:debug [fpi_drvcb_open_complete] status 0
sync:debug [sync_open_cb] status 0
Opened device. It's now time to scan your finger.

sync:debug [fp_dev_img_capture] to be handled by elan
async:debug [fp_async_capture_start]
fp:debug [generic_acquire_start] action 4
elan:debug [dev_activate]
elan:debug [elan_activate]
elan:debug [elan_dev_reset]
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 0
elan:debug [elan_run_cmd] 4019
elan:debug [elan_cmd_cb]
elan:debug [elan_cmd_read]
elan:debug [elan_cmd_cb] 0142
elan:debug [elan_cmd_done]
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 1
elan:debug [activate_run_state] FW ver 0x0142
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 2
elan:debug [elan_run_cmd] 000c
elan:debug [elan_cmd_cb]
elan:debug [elan_cmd_read]
elan:debug [elan_cmd_cb] 4000... (4 bytes)
elan:debug [elan_cmd_done]
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 3
elan:debug [activate_run_state] sensor dimensions, WxH: 144x64
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 4
elan:debug [elan_run_cmd] 402a
elan:debug [elan_run_cmd] skipping for this device
elan:debug [elan_cmd_done]
drv:debug [fpi_ssm_mark_completed] 0x55992d323ff0 completed with status 0
elan:debug [activate_complete]
fp:debug [fpi_imgdev_activate_complete] status 0
async:debug [fpi_drvcb_capture_started]
elan:debug [dev_change_state] 1
poll:debug [fpi_timeout_add] in 10ms
poll:debug [get_next_timeout_expiry] next timeout in 0.009994s
poll:debug [get_next_timeout_expiry] next timeout in 0.009980s
poll:debug [get_next_timeout_expiry] first timeout already expired
poll:debug [handle_timeout]
elan:debug [elan_change_state] changing to 1
elan:debug [elan_calibrate]
elan:debug [elan_dev_reset]
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 0
elan:debug [elan_run_cmd] 0009
elan:debug [elan_cmd_cb]
elan:debug [elan_cmd_read]
elan:debug [elan_cmd_cb] 8b24... (18432 bytes)
elan:debug [elan_cmd_done]
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 1
elan:debug [elan_save_background]
elan:debug [elan_save_frame]
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 2
elan:debug [elan_run_cmd] 4024
elan:debug [elan_cmd_cb]
elan:debug [elan_cmd_read]
elan:debug [elan_cmd_cb] 1af0
elan:debug [elan_cmd_done]
drv:debug [__ssm_call_handler] 0x55992d323ff0 entering state 3
elan:debug [elan_need_calibration]
elan:debug [elan_need_calibration] calibration mean: 6870, bg mean: 6748, delta: 122
drv:debug [fpi_ssm_mark_completed] 0x55992d323ff0 completed with status 0
elan:debug [calibrate_complete]
elan:debug [elan_capture]
elan:debug [elan_dev_reset]
drv:debug [__ssm_call_handler] 0x55992d32c070 entering state 0
elan:debug [elan_run_cmd] 4031
elan:debug [elan_cmd_cb]
elan:debug [elan_cmd_read]
elan:debug [elan_cmd_read] skipping read, not expecting anything
elan:debug [elan_cmd_done]
drv:debug [__ssm_call_handler] 0x55992d32c070 entering state 1
elan:debug [elan_run_cmd] 403f
elan:debug [elan_cmd_cb]
elan:debug [elan_cmd_read]
elan:debug [elan_cmd_cb] af
elan:debug [elan_cmd_done]
drv:debug [__ssm_call_handler] 0x55992d32c070 entering state 2
drv:debug [fpi_ssm_mark_aborted] error -74 from state 2
drv:debug [fpi_ssm_mark_completed] 0x55992d32c070 completed with status -74
elan:debug [capture_complete]
elan:debug [dev_change_state] 3
poll:debug [fpi_timeout_add] in 10ms
poll:debug [get_next_timeout_expiry] next timeout in 0.009990s
poll:debug [get_next_timeout_expiry] next timeout in 0.009965s
poll:debug [get_next_timeout_expiry] first timeout already expired
poll:debug [handle_timeout]
elan:debug [elan_change_state] changing to 3
elan:debug [elan_stop_capture]
elan:debug [elan_dev_reset]
drv:debug [__ssm_call_handler] 0x55992d32c070 entering state 0
elan:debug [stop_capture_run_state]
elan:debug [elan_run_cmd] 000b
elan:debug [elan_cmd_cb]
elan:debug [elan_cmd_read]
elan:debug [elan_cmd_read] skipping read, not expecting anything
elan:debug [elan_cmd_done]
drv:debug [fpi_ssm_mark_completed] 0x55992d32c070 completed with status 0
elan:debug [stop_capture_complete]
fp:debug [fpi_imgdev_report_finger_status] finger removed
async:debug [fpi_drvcb_report_capture_result] result -74
elan:debug [dev_change_state] 1
poll:debug [fpi_timeout_add] in 10ms
poll:debug [get_next_timeout_expiry] next timeout in 0.009992s
sync:error [fp_dev_img_capture] unrecognised return code -74
sync:debug [fp_dev_img_capture] ending capture
async:debug [fp_async_capture_stop]
elan:debug [dev_deactivate]
elan:debug [dev_change_state] 0
poll:debug [fpi_timeout_add] in 10ms
poll:debug [get_next_timeout_expiry] next timeout in 0.009800s
poll:debug [get_next_timeout_expiry] first timeout already expired
poll:debug [handle_timeout]
elan:debug [elan_change_state] changing to 0
elan:debug [elan_deactivate]
fp:debug [fpi_imgdev_deactivate_complete]
async:debug [fpi_drvcb_capture_stopped]
sync:debug [capture_stop_cb]
image capture failed, code -22
sync:debug [fp_dev_close]
elan:debug [dev_deinit]
elan:debug [elan_dev_reset]
async:debug [fpi_drvcb_close_complete]
sync:debug [sync_close_cb]
fp:debug [fp_exit]

[iafilatov]

This code is rather old. You should try https://gitlab.freedesktop.org/libfprint/libfprint. But I can't say if it will work because your reader is returning an unexpected value for a certain command.