Hey @megavolt, thanks for your answer. I opened simple-scan as suggested, the log is attached.
-
[+10,60s] DEBUG: scanner.vala:1657: Requesting redetection of scan devices
apparently is what causes the password request. I noticed that I only have to enter the password when I start simple-scan for the first time after a reboot.
- I googled
[+32,06s] CRITICAL: page_finish: assertion ‘self != NULL’ failed
and found that someone on Linux Mint had the same issue a year ago. No solution though. (Scanning several Pages from flatbet scanner doesn't work (simple-scan; HP envy 4504) - Linux Mint Forums)
Looks like a bug to me but would be strange if nobody noticed until now. This seems to be my issue, I will join the conversation: Failed to scan document (#245) · Issues · GNOME / Document Scanner · GitLab
simple-scan --debug ✔
[+0,00s] DEBUG: simple-scan.vala:2014: Starting simple-scan 40.1, PID=3489
[+0,00s] DEBUG: unsetenv() is not thread-safe and should not be used after threads are created
[+0,06s] DEBUG: app-window.vala:2003: Loading state from /home/christian/.cache/simple-scan/state
[+0,06s] DEBUG: app-window.vala:1982: Restoring window to 600x400 pixels
[+0,06s] DEBUG: app-window.vala:1986: Restoring window to maximized
[+0,17s] DEBUG: app-window.vala:2078: Saving state to /home/christian/.cache/simple-scan/state
[+2,12s] DEBUG: scanner.vala:1590: sane_init () -> SANE_STATUS_GOOD
[+2,12s] DEBUG: scanner.vala:1596: SANE version 1.0.32
[+2,12s] DEBUG: scanner.vala:1657: Requesting redetection of scan devices
[+2,12s] DEBUG: scanner.vala:844: Processing request
[+10,60s] DEBUG: scanner.vala:348: sane_get_devices () -> SANE_STATUS_GOOD
[+10,60s] DEBUG: scanner.vala:1657: Requesting redetection of scan devices
[+10,60s] DEBUG: scanner.vala:844: Processing request
[+17,82s] DEBUG: scanner.vala:348: sane_get_devices () -> SANE_STATUS_GOOD
[+17,82s] DEBUG: scanner.vala:360: Device: name="escl:http://192.168.178.37:80" vendor="Brother" model="MFC-L2710DN series" type="adf,platen scanner"
[+25,10s] DEBUG: simple-scan.vala:1819: Requesting scan at 300 dpi from device 'escl:http://192.168.178.37:80'
[+25,10s] DEBUG: scanner.vala:1748: Scanner.scan ("escl:http://192.168.178.37:80", dpi=300, scan_mode=ScanMode.GRAY, depth=2, type=adf, side=both, paper_width=0, paper_height=0, brightness=0, contrast=22, delay=0ms)
[+25,10s] DEBUG: scanner.vala:844: Processing request
[+25,12s] DEBUG: scanner.vala:905: sane_open ("escl:http://192.168.178.37:80") -> SANE_STATUS_GOOD
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (0)
[+25,12s] DEBUG: scanner.vala:776: Option 0: name='(null)' title='Number of options' type=int size=4 cap=soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Read-only option that specifies how many options a specific device supports.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (1)
[+25,12s] DEBUG: scanner.vala:776: Option 1: name='(null)' title='Scan mode' type=group size=0
[+25,12s] DEBUG: scanner.vala:779: Description:
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (2)
[+25,12s] DEBUG: scanner.vala:776: Option 2: name='mode' title='Scan mode' type=string size=8 values=["Lineart", "Gray", "Color"] cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Selects the scan mode (e.g., lineart, monochrome, or color).
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (3)
[+25,12s] DEBUG: scanner.vala:776: Option 3: name='resolution' title='Scan resolution' type=int size=4 unit=dpi values=[100, 200, 300, 600] cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Sets the resolution of the scanned image.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (4)
[+25,12s] DEBUG: scanner.vala:776: Option 4: name='source' title='Scan source' type=string size=8 values=["Flatbed", "ADF"] cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Selects the scan source (such as a document-feeder).
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (5)
[+25,12s] DEBUG: scanner.vala:776: Option 5: name='(null)' title='Geometry' type=group size=0 cap=advanced
[+25,12s] DEBUG: scanner.vala:779: Description: Scan area and media size options
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (6)
[+25,12s] DEBUG: scanner.vala:776: Option 6: name='tl-x' title='Top-left x' type=fixed size=4 unit=mm min=0,000000, max=214,545319, quant=0 cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Top-left x position of scan area.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (7)
[+25,12s] DEBUG: scanner.vala:776: Option 7: name='tl-y' title='Top-left y' type=fixed size=4 unit=mm min=0,000000, max=295,571320, quant=0 cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Top-left y position of scan area.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (8)
[+25,12s] DEBUG: scanner.vala:776: Option 8: name='br-x' title='Bottom-right x' type=fixed size=4 unit=mm min=1,354660, max=215,899994, quant=0 cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Bottom-right x position of scan area.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (9)
[+25,12s] DEBUG: scanner.vala:776: Option 9: name='br-y' title='Bottom-right y' type=fixed size=4 unit=mm min=1,354660, max=296,925995, quant=0 cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Bottom-right y position of scan area.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (10)
[+25,12s] DEBUG: scanner.vala:776: Option 10: name='(null)' title='Enhancement' type=group size=0 cap=advanced
[+25,12s] DEBUG: scanner.vala:779: Description:
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (11)
[+25,12s] DEBUG: scanner.vala:776: Option 11: name='preview' title='Preview' type=bool size=4 cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Request a preview-quality scan.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (12)
[+25,12s] DEBUG: scanner.vala:776: Option 12: name='preview-in-gray' title='Force monochrome preview' type=bool size=4 cap=soft-select,soft-detect
[+25,12s] DEBUG: scanner.vala:779: Description: Request that all previews are done in monochrome mode. On a three-pass scanner this cuts down the number of passes to one and on a one-pass scanner, it reduces the memory requirements and scan-time of the preview.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (13)
[+25,12s] DEBUG: scanner.vala:776: Option 13: name='brightness' title='Brightness' type=int size=4 min=-1, max=2, quant=0 cap=soft-select,soft-detect,inactive
[+25,12s] DEBUG: scanner.vala:779: Description: Controls the brightness of the acquired image.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (14)
[+25,12s] DEBUG: scanner.vala:776: Option 14: name='contrast' title='Contrast' type=int size=4 min=-1, max=2, quant=0 cap=soft-select,soft-detect,inactive
[+25,12s] DEBUG: scanner.vala:779: Description: Controls the contrast of the acquired image.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (15)
[+25,12s] DEBUG: scanner.vala:776: Option 15: name='sharpen' title='Sharpen' type=int size=4 min=-1, max=2, quant=0 cap=soft-select,soft-detect,inactive
[+25,12s] DEBUG: scanner.vala:779: Description: Set sharpen value.
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (16)
[+25,12s] DEBUG: scanner.vala:776: Option 16: name='threshold' title='Threshold' type=int size=4 min=-1, max=2, quant=0 cap=soft-select,soft-detect,inactive
[+25,12s] DEBUG: scanner.vala:779: Description: Select minimum-brightness to get a white point
[+25,12s] DEBUG: scanner.vala:982: sane_get_option_descriptor (17)
[+25,12s] DEBUG: scanner.vala:583: sane_control_option (4, SANE_ACTION_SET_VALUE, source="ADF") -> (SANE_STATUS_GOOD, "ADF")
[+25,12s] DEBUG: scanner.vala:583: sane_control_option (2, SANE_ACTION_SET_VALUE, mode="Gray") -> (SANE_STATUS_GOOD, "Gray")
[+25,12s] DEBUG: scanner.vala:495: sane_control_option (3, SANE_ACTION_SET_VALUE, resolution=300) -> (SANE_STATUS_GOOD, 300)
[+25,12s] DEBUG: scanner.vala:565: sane_control_option (8, SANE_ACTION_SET_VALUE, br-x=option.range.max=215,899994) -> (SANE_STATUS_GOOD)
[+25,12s] DEBUG: scanner.vala:565: sane_control_option (9, SANE_ACTION_SET_VALUE, br-y=option.range.max=355,599991) -> (SANE_STATUS_GOOD)
[+25,12s] WARNING: scanner.vala:1286: The option brightness (13) is inactive and can't be set, please file a bug
[+25,12s] WARNING: scanner.vala:1286: The option contrast (14) is inactive and can't be set, please file a bug
[+31,86s] DEBUG: scanner.vala:1322: sane_start (page=0, pass=0) -> SANE_STATUS_GOOD
[+31,86s] DEBUG: scanner.vala:1359: sane_get_parameters () -> SANE_STATUS_GOOD
[+31,86s] DEBUG: scanner.vala:1371: Parameters: format=SANE_FRAME_RGB last_frame=SANE_TRUE bytes_per_line=7536 pixels_per_line=2512 lines=3477 depth=8
[+31,86s] DEBUG: scanner.vala:1446: sane_read (7537) -> (SANE_STATUS_GOOD, 7537)
[+31,86s] DEBUG: simple-scan.vala:1714: Page is 2512 pixels wide, 3477 pixels high, 8 bits per pixel
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,86s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
...
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: simple-scan.vala:1648: Getting color profile for device escl:http://192.168.178.37:80
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
[+31,87s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15072)
...
[+31,88s] DEBUG: scanner.vala:1446: sane_read (15072) -> (SANE_STATUS_GOOD, 15071)
[+31,91s] DEBUG: scanner.vala:1446: sane_read (15073) -> (SANE_STATUS_EOF, 0)
[+32,05s] DEBUG: autosave-manager.vala:355: Autosaving page pixels to /home/christian/.cache/simple-scan/autosaves/3758958432.pixels
[+32,06s] DEBUG: autosave-manager.vala:287: Autosaving book information
[+32,06s] DEBUG: autosave-manager.vala:304: Autosaving page page-0
[+32,06s] CRITICAL: page_finish: assertion 'self != NULL' failed
[+32,09s] DEBUG: simple-scan.vala:1668: Unable to find colord device escl:http://192.168...:80: property match 'Serial'='sane:escl:http://192.168...:80' does not exist
[+35,05s] DEBUG: scanner.vala:1322: sane_start (page=1, pass=0) -> SANE_STATUS_INVAL
[+35,05s] WARNING: scanner.vala:1349: Unable to start device: Invalid argument
[+55,38s] DEBUG: scanner.vala:806: sane_cancel ()
[+55,38s] DEBUG: scanner.vala:809: sane_close ()
[+75,52s] DEBUG: autosave-manager.vala:201: Deleting autosave records
[+75,52s] DEBUG: scanner.vala:1778: Stopping scan thread
[+75,52s] DEBUG: scanner.vala:844: Processing request
[+75,53s] DEBUG: scanner.vala:1789: sane_exit ()