HPLIP 3.19.6在18.04上没有看到USB HP LaserJet Pro MFP M125ra

问题：MFU像打印机一样工作，但不像扫描仪那样工作。

安装了最新的HPLIP版本：developers.hp.com的3.19.6。

:~$ hp-setup

hp-doctor命令输出：

------------------------------
| DISCOVERED SCANNER DEVICES |
------------------------------

No Scanner found.

--------------------------
| DISCOVERED USB DEVICES |
--------------------------

No devices found.

---------------------------------
| INSTALLED CUPS PRINTER QUEUES |
---------------------------------


HP-LaserJet-Pro-MFP-M125ra
--------------------------
Type: Unknown
Device URI: usb://HP/LaserJet%20Pro%20MFP%20M125ra?serial=CNB7GCJHZQ&interface=1
PPD: /etc/cups/ppd/HP-LaserJet-Pro-MFP-M125ra.ppd
warning: Failed to read /etc/cups/ppd/HP-LaserJet-Pro-MFP-M125ra.ppd ppd file
PPD Description: 
Printer status: printer HP-LaserJet-Pro-MFP-M125ra is idle.  enabled since Чт 06 июн 2019 17:54:40
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.


--------------
| PERMISSION |
--------------

error: Unsupported model: HP_LaserJet_Pro_MFP_M125ra


Checking Permissions....


Checking for Configured Queues....
warning: Fail to read ppd=/etc/cups/ppd/HP-LaserJet-Pro-MFP-M125ra.ppd file
warning: Insufficient permission to access file /etc/cups/ppd/HP-LaserJet-Pro-MFP-M125ra.ppd
warning: Could not complete Queue(s) configuration check


Checking for HP Properitery Plugin's....
No plug-in printers are configured.

Diagnose completed...

lsusb命令输出：

Bus 002 Device 009: ID 03f0:222a Hewlett-Packard

sane-find-scanner命令输出：

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x222a [HP LaserJet Pro MFP M125ra]) at libusb:002:009
could not open USB device 0x04d9/0x0175 at 002:006: Access denied (insufficient permissions)
could not open USB device 0x2109/0x2812 at 002:004: Access denied (insufficient permissions)
could not open USB device 0x0001/0x0000 at 002:003: Access denied (insufficient permissions)
could not open USB device 0x8087/0x0024 at 002:002: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 002:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0003 at 004:001: Access denied (insufficient permissions)
could not open USB device 0x046d/0xc52b at 003:003: Access denied (insufficient permissions)
could not open USB device 0x0461/0x0010 at 003:002: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 003:001: Access denied (insufficient permissions)
could not open USB device 0x8087/0x0024 at 001:002: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 001:001: Access denied (insufficient permissions)
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.

  # You may want to run this program as root to find all devices. Once you
  # found the scanner devices, be sure to adjust access permissions as
  # necessary.

无需hplip设置即可工作的打印机。.如何使扫描仪工作？