Hi, it is a usb local printer that is recognized by system but not found when I try to add it by running localhost:631>manage printers or >find new printer I tried many ways and I noticed the print is recognized: bash-4.3# /usr/lib/cups/backend/usb DEBUG: Loading USB quirks from "/usr/share/cups/usb". DEBUG: Loaded 114 quirks. DEBUG: list_devices DEBUG: libusb_get_device_list=16 DEBUG2: Printer found with device ID: MFG:Samsung;CMD:SPL,URF,FAX,FWV,PIC,DCU,EXT;MDL:SCX-3400 Series;CLS:PRINTER;MODE:FAX3,SCN,SPL3,R000105;STATUS:BUSY; Device URI: usb://Samsung/SCX-3400%20Series?serial=Z6YMBQAD600274D&interface=1 direct usb://Samsung/SCX-3400%20Series?serial=Z6YMBQAD600274D&interface=1 "Samsung SCX-3400 Series" "Samsung SCX-3400 Series" "MFG:Samsung;CMD:SPL,URF,FAX,FWV,PIC,DCU,EXT;MDL:SCX-3400 Series;CLS:PRINTER;MODE:FAX3,SCN,SPL3,R000105;STATUS:BUSY;" "" bash-4.3# cupsd bash-4.3# lsusb Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 006: ID 046d:0825 Logitech, Inc. Webcam C270 Bus 001 Device 007: ID 04e8:344f Samsung Electronics Co., Ltd SCX-3400 Series when I run the command below the return is : bash-4.3# lpinfo -v network socket network ipps network https network lpd network ipp network http bash-4.3# I have downloaded the driver and installed it. it was useless... tks in advance for those who print and maybe have an idea.