mna@mnanb:~$ simple-scan -d > all.log   
[+0,00s] DEBUG: simple-scan.vala:674: Starting Simple Scan 3.20.0, PID=24661
[+0,00s] DEBUG: Connecting to session manager
[+0,04s] DEBUG: ui.vala:2032: Loading state from /home/mna/.cache/simple-scan/state
[+0,04s] DEBUG: ui.vala:1995: Restoring window to 975x761 pixels
[+0,04s] DEBUG: ui.vala:1999: Restoring window to maximized
[+0,04s] DEBUG: autosave-manager.vala:64: Loading autosave information
[+0,04s] DEBUG: autosave-manager.vala:259: Waiting to autosave...
[+0,04s] CRITICAL: gtk_event_controller_reset: assertion 'GTK_IS_EVENT_CONTROLLER (controller)' failed
[+0,07s] DEBUG: scanner.vala:1447: sane_init () -> SANE_STATUS_GOOD
[+0,07s] DEBUG: scanner.vala:1453: SANE version 1.0.25
[+0,07s] DEBUG: scanner.vala:1514: Requesting redetection of scan devices
[+0,07s] DEBUG: scanner.vala:803: Processing request
[+0,14s] DEBUG: autosave-manager.vala:281: Autosaving book information
[+0,17s] DEBUG: ui.vala:2124: Saving state to /home/mna/.cache/simple-scan/state
[+5,30s] DEBUG: scanner.vala:338: sane_get_devices () -> SANE_STATUS_GOOD
[+5,30s] DEBUG: scanner.vala:350: Device: name="brother4:net1;dev0" vendor="Brother" model="*mjscanner" type="DCP-9022CDW"
[+9,50s] DEBUG: simple-scan.vala:404: Requesting scan at 300 dpi from device 'brother4:net1;dev0'
[+9,50s] DEBUG: scanner.vala:1560: Scanner.scan ("brother4:net1;dev0", dpi=300, scan_mode=ScanMode.COLOR, depth=8, type=ScanType.ADF_BOTH, paper_width=2100, paper_height=2970, brightness=0, contrast=0)
[+9,50s] DEBUG: scanner.vala:803: Processing request
[+12,48s] DEBUG: scanner.vala:864: sane_open ("brother4:net1;dev0") -> SANE_STATUS_GOOD
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (0)
[+12,48s] DEBUG: scanner.vala:735: Option 0: name='(null)' title='Number of options' type=bool size=4 cap=soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Read-only option that specifies how many options a specific devices supports.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (1)
[+12,48s] DEBUG: scanner.vala:735: Option 1: name='(null)' title='Mode' type=group size=4 cap=advanced
[+12,48s] DEBUG: scanner.vala:738:   Description: 
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (2)
[+12,48s] DEBUG: scanner.vala:735: Option 2: name='mode' title='Scan mode' type=string size=30 values=["Black & White", "Gray[Error Diffusion]", "True Gray", "24bit Color", "24bit Color[Fast]"] cap=soft-select,soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Select the scan mode
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (3)
[+12,48s] DEBUG: scanner.vala:735: Option 3: name='resolution' title='Scan resolution' type=int size=4 unit=dpi values=[100, 150, 200, 300, 400, 600, 1200, 2400, 4800, 9600] cap=soft-select,soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Sets the resolution of the scanned image.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (4)
[+12,48s] DEBUG: scanner.vala:735: Option 4: name='source' title='Scan source' type=string size=64 values=["FlatBed", "Automatic Document Feeder(left aligned)", "Automatic Document Feeder(left aligned,Duplex)", "Automatic Document Feeder(centrally aligned)", "Automatic Document Feeder(centrally aligned,Duplex)"] cap=soft-select,soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Selects the scan source (such as a document-feeder).
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (5)
[+12,48s] DEBUG: scanner.vala:735: Option 5: name='brightness' title='Brightness' type=fixed size=4 unit=percent min=-50,000000, max=50,000000, quant=65536 cap=soft-select,soft-detect,inactive
[+12,48s] DEBUG: scanner.vala:738:   Description: Controls the brightness of the acquired image.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (6)
[+12,48s] DEBUG: scanner.vala:735: Option 6: name='contrast' title='Contrast' type=fixed size=4 unit=percent min=-50,000000, max=50,000000, quant=65536 cap=soft-select,soft-detect,inactive
[+12,48s] DEBUG: scanner.vala:738:   Description: Controls the contrast of the acquired image.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (7)
[+12,48s] DEBUG: scanner.vala:735: Option 7: name='(null)' title='Geometry' type=group size=4 cap=advanced
[+12,48s] DEBUG: scanner.vala:738:   Description: 
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (8)
[+12,48s] DEBUG: scanner.vala:735: Option 8: name='tl-x' title='Top-left x' type=fixed size=4 unit=mm min=0,000000, max=215,899994, quant=6553 cap=soft-select,soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Top-left x position of scan area.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (9)
[+12,48s] DEBUG: scanner.vala:735: Option 9: name='tl-y' title='Top-left y' type=fixed size=4 unit=mm min=0,000000, max=355,599991, quant=6553 cap=soft-select,soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Top-left y position of scan area.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (10)
[+12,48s] DEBUG: scanner.vala:735: Option 10: name='br-x' title='Bottom-right x' type=fixed size=4 unit=mm min=0,000000, max=215,899994, quant=6553 cap=soft-select,soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Bottom-right x position of scan area.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (11)
[+12,48s] DEBUG: scanner.vala:735: Option 11: name='br-y' title='Bottom-right y' type=fixed size=4 unit=mm min=0,000000, max=355,599991, quant=6553 cap=soft-select,soft-detect
[+12,48s] DEBUG: scanner.vala:738:   Description: Bottom-right y position of scan area.
[+12,48s] DEBUG: scanner.vala:885: sane_get_option_descriptor (12)
[+12,48s] DEBUG: scanner.vala:546: sane_control_option (4, SANE_ACTION_SET_VALUE, "Automatic Document Feeder(centrally aligned,Duplex)") -> (SANE_STATUS_GOOD, "Automatic Document Feeder(centrally aligned,Duplex)")
[+12,48s] DEBUG: scanner.vala:546: sane_control_option (2, SANE_ACTION_SET_VALUE, "24bit Color") -> (SANE_STATUS_GOOD, "24bit Color")
[+12,48s] DEBUG: scanner.vala:462: sane_control_option (3, SANE_ACTION_SET_VALUE, 300) -> (SANE_STATUS_GOOD, 300)
[+12,48s] DEBUG: scanner.vala:502: sane_control_option (10, SANE_ACTION_SET_VALUE, 210,000000) -> (SANE_STATUS_GOOD, 209,980774)
[+12,48s] DEBUG: scanner.vala:502: sane_control_option (11, SANE_ACTION_SET_VALUE, 297,000000) -> (SANE_STATUS_GOOD, 296,972809)
[+20,53s] DEBUG: scanner.vala:1213: sane_start (page=0, pass=0) -> SANE_STATUS_GOOD
[+20,53s] DEBUG: scanner.vala:1230: sane_get_parameters () -> SANE_STATUS_GOOD
[+20,53s] DEBUG: scanner.vala:1242: Parameters: format=SANE_FRAME_RGB last_frame=SANE_TRUE bytes_per_line=7440 pixels_per_line=2480 lines=3506 depth=8
[+20,53s] DEBUG: simple-scan.vala:348: Page is 2480 pixels wide, 3506 pixels high, 8 bits per pixel
[+20,53s] DEBUG: scanner.vala:1314: sane_read (7441) -> (SANE_STATUS_IO_ERROR, 0)
[+20,53s] WARNING: scanner.vala:1330: Unable to read frame from device: Error during device I/O
[+20,54s] DEBUG: simple-scan.vala:282: Getting color profile for device brother4:net1;dev0
[+20,56s] DEBUG: simple-scan.vala:302: Unable to find colord device brother4:net1;dev0: property match 'Serial'='sane:brother4:net1;dev0' does not exist
[+20,64s] DEBUG: ui.vala:2124: Saving state to /home/mna/.cache/simple-scan/state
[+23,56s] DEBUG: scanner.vala:765: sane_cancel ()
[+23,56s] DEBUG: scanner.vala:768: sane_close ()
[+23,66s] DEBUG: ui.vala:2124: Saving state to /home/mna/.cache/simple-scan/state
[+30,42s] DEBUG: autosave-manager.vala:195: Deleting autosave records
[+30,42s] DEBUG: scanner.vala:1587: Stopping scan thread
[+30,42s] DEBUG: scanner.vala:803: Processing request
[+30,42s] DEBUG: scanner.vala:1598: sane_exit ()
mna@mnanb:~$