lsusb
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 003: ID 046d:c018 Logitech, Inc. Optical Wheel Mouse
Bus 005 Device 002: ID 046d:c312 Logitech, Inc. DeLuxe 250 Keyboard
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 051d:0002 American Power Conversion Uninterruptible 
Power Supply
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

sudo /usr/lib/cups/backend/usb
[sudo] password for dlevin: 
DEBUG: Loading USB quirks from "/usr/share/cups/usb".
DEBUG: Loaded 159 quirks.
DEBUG: list_devices
DEBUG: libusb_get_device_list=9

sudo /usr/lib/cups/backend/hp
direct hp "Unknown" "HP Printer (HPLIP)"

ps auxwww | grep ippusbxd
dlevin    5871  0.0  0.0  21536  1092 pts/0    S+   14:20   0:00 grep 
--color=auto ippusbxd

The USB port works with a memory stick.  The "Color LaserJet Pro MFP
M277dw" was added to HPLIP back in 3.15.


** Attachment added: "Please review attached file and output requested.  
Thanks!"
   
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1783861/+attachment/5168264/+files/lsusb.txt

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https://bugs.launchpad.net/bugs/1783861

Title:
  USB Printer not recognized by Ubuntu 18.04

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