test@test:~$ simple-scan -d
** (simple-scan:19468): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-bBbTFATIer: Connessione rifiutata
[+0,00s] DEBUG: simple-scan.vala:674: Starting Simple Scan 3.20.0, PID=19468
[+0,01s] DEBUG: Connecting to session manager
[+0,31s] DEBUG: ui.vala:2032: Loading state from /home/test/.cache/simple-scan/state
[+0,31s] DEBUG: ui.vala:1995: Restoring window to 600x400 pixels
[+0,31s] DEBUG: ui.vala:1999: Restoring window to maximized
[+0,31s] DEBUG: autosave-manager.vala:64: Loading autosave information
[+0,31s] DEBUG: autosave-manager.vala:259: Waiting to autosave...
[+0,31s] CRITICAL: gtk_event_controller_reset: assertion 'GTK_IS_EVENT_CONTROLLER (controller)' failed
[+0,50s] DEBUG: autosave-manager.vala:281: Autosaving book information
[+0,50s] DEBUG: ui.vala:2124: Saving state to /home/test/.cache/simple-scan/state
[+0,50s] DEBUG: scanner.vala:1447: sane_init () -> SANE_STATUS_GOOD
[+0,50s] DEBUG: scanner.vala:1453: SANE version 1.0.25
[+0,50s] DEBUG: scanner.vala:1514: Requesting redetection of scan devices
[+0,51s] DEBUG: scanner.vala:803: Processing request
[+0,68s] DEBUG: ui.vala:2124: Saving state to /home/test/.cache/simple-scan/state
[+7,17s] DEBUG: scanner.vala:338: sane_get_devices () -> SANE_STATUS_GOOD
[+7,17s] DEBUG: scanner.vala:350: Device: name="smfp:usb;04e8;3419;8P36BADQA00364J." vendor="Samsung" model="SCX-4x21 Series on USB" type="Scanner"
[+14,48s] DEBUG: simple-scan.vala:404: Requesting scan at 300 dpi from device 'smfp:usb;04e8;3419;8P36BADQA00364J.'
[+14,48s] DEBUG: scanner.vala:1560: Scanner.scan ("smfp:usb;04e8;3419;8P36BADQA00364J.", dpi=300, scan_mode=ScanMode.COLOR, depth=8, type=ScanType.SINGLE, paper_width=0, paper_height=0, brightness=0, contrast=0)
[+14,48s] DEBUG: scanner.vala:803: Processing request
[+48,80s] DEBUG: scanner.vala:864: sane_open ("smfp:usb;04e8;3419;8P36BADQA00364J.") -> SANE_STATUS_IO_ERROR
[+48,80s] WARNING: scanner.vala:868: Unable to get open device: Error during device I/O
[+48,92s] DEBUG: ui.vala:2124: Saving state to /home/test/.cache/simple-scan/state