I have recently installed Debian 11 on my desktop, which is connected to the HP Printer-scanner mentioned in the caption. I installed CUPS, and then HPLIP through Synaptic. The latter is confirmed through terminal:
While printing works, the scanner is detected but doesn't work.hplip is already the newest version (3.21.2+dfsg1-2)
However, using Document Scan, I get an error message "Failed to scan. Unable to connect to scanner."scanimage -L
device `hpaio:/usb/HP_LaserJet_Pro_MFP_M128fw?serial=CNB9JC75GN' is a Hewlett-Packard HP_LaserJet_Pro_MFP_M128fw all-in-one
I have confirmed that both printing and scanning are supported through the installed version of HPLIP. Screenshot of the supported devices page of HP (https://developers.hp.com/hp-linux-imag ... ices/index) lists my printer-scanner. Screenshot is attached.
Shall be obliged for any advice/help. Thanks a lot!