ok - got it
farcus@localhost:~> export SANE_DEBUG_DLL=128
farcus@localhost:~> hp-scan
**HP Linux Imaging and Printing System (ver. 3.21.10)**
**Scan Utility ver. 2.2**
Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.
[20:20:36.525304] [sanei_debug] Setting debug level of dll to 128.
[20:20:36.525331] [dll] sane_init: SANE dll backend version 1.0.13 from sane-backends 1.0.32
[20:20:36.525340] [dll] sane_init/read_dlld: attempting to open directory `./dll.d'
[20:20:36.525350] [dll] sane_init/read_dlld: attempting to open directory `/etc/sane.d/dll.d'
[20:20:36.525377] [dll] sane_init/read_dlld: using config directory `/etc/sane.d/dll.d'
[20:20:36.525389] [dll] sane_init/read_dlld: considering /etc/sane.d/dll.d/hpaio
[20:20:36.525405] [dll] sane_init/read_config: reading dll.d/hpaio
[20:20:36.525433] [dll] add_backend: adding backend `hpaio'
[20:20:36.525445] [dll] sane_init/read_dlld: done.
[20:20:36.525466] [dll] sane_init/read_config: reading dll.conf
[20:20:36.525486] [dll] add_backend: adding backend `hpaio'
[20:20:36.525493] [dll] add_backend: `hpaio' is already there
[20:20:36.525511] [dll] sane_get_devices
[20:20:36.525520] [dll] load: searching backend `hpaio' in `/usr/lib64/sane'
[20:20:36.525528] [dll] load: trying to load `/usr/lib64/sane/libsane-hpaio.so.1'
[20:20:36.525540] [dll] load: dlopen()ing `/usr/lib64/sane/libsane-hpaio.so.1'
[20:20:36.525834] [dll] init: initializing backend `hpaio'
[20:20:36.526962] [dll] init: backend `hpaio' is version 1.0.0
[20:20:36.550547] [dll] sane_get_devices: found 2 devices
[20:20:36.550598] [dll] sane_exit: exiting
[20:20:36.550608] [dll] sane_exit: calling backend `hpaio's exit function
[20:20:36.550690] [dll] sane_exit: finished
-----------------
| SELECT DEVICE |
-----------------
Num Scan device URI
-------- -------------------------------------------------------
0 hpaio:/net/ENVY_6000_series?zc=HP842AFD413304
1 hpaio:/net/envy_6000_series?ip=192.168.1.43&queue=false
**Enter number 0...1 for device (q=quit) ?**0
**warning: No destinations specified. Adding 'file' destination by default.**
[20:20:48.102711] [sanei_debug] Setting debug level of dll to 128.
[20:20:48.102732] [dll] sane_init: SANE dll backend version 1.0.13 from sane-backends 1.0.32
[20:20:48.102740] [dll] sane_init/read_dlld: attempting to open directory `./dll.d'
[20:20:48.102777] [dll] sane_init/read_dlld: attempting to open directory `/etc/sane.d/dll.d'
[20:20:48.102813] [dll] sane_init/read_dlld: using config directory `/etc/sane.d/dll.d'
[20:20:48.102839] [dll] sane_init/read_dlld: considering /etc/sane.d/dll.d/hpaio
[20:20:48.102880] [dll] sane_init/read_config: reading dll.d/hpaio
[20:20:48.102915] [dll] add_backend: adding backend `hpaio'
[20:20:48.102942] [dll] sane_init/read_dlld: done.
[20:20:48.102965] [dll] sane_init/read_config: reading dll.conf
[20:20:48.103008] [dll] add_backend: adding backend `hpaio'
[20:20:48.103015] [dll] add_backend: `hpaio' is already there
**Using device hpaio:/net/ENVY_6000_series?zc=HP842AFD413304**
Opening connection to device...
[20:20:48.103153] [dll] sane_open: trying to open `hpaio:/net/ENVY_6000_series?zc=HP842AFD413304'
[20:20:48.103165] [dll] load: searching backend `hpaio' in `/usr/lib64/sane'
[20:20:48.103173] [dll] load: trying to load `/usr/lib64/sane/libsane-hpaio.so.1'
[20:20:48.103186] [dll] load: dlopen()ing `/usr/lib64/sane/libsane-hpaio.so.1'
[20:20:48.103462] [dll] init: initializing backend `hpaio'
[20:20:48.103497] [dll] init: backend `hpaio' is version 1.0.0
[20:20:48.308811] [dll] sane_open: open successful
[20:20:48.308920] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=1)
[20:20:48.308951] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=2)
[20:20:48.308968] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=3)
[20:20:48.308986] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=4)
[20:20:48.309002] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=5)
[20:20:48.309018] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=6)
[20:20:48.309032] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=7)
[20:20:48.309049] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=8)
[20:20:48.309066] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=9)
[20:20:48.309081] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=10)
[20:20:48.309102] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=11)
[20:20:48.309124] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=12)
[20:20:48.309142] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=13)
[20:20:48.309159] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=14)
[20:20:48.309177] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=15)
[20:20:48.309194] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=16)
[20:20:48.309348] [dll] sane_control_option(handle=0x561860528a40,option=9,action=1,value=0x7ffe73f77e
70,info=0x7ffe73f77e84)
[20:20:48.309384] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=4)
[20:20:48.309403] [dll] sane_control_option(handle=0x561860528a40,option=4,action=1,value=0x5618605287
70,info=0x7ffe73f77e84)
[20:20:48.309440] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=1)
[20:20:48.309461] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=2)
[20:20:48.309480] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=3)
[20:20:48.309499] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=4)
[20:20:48.309517] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=5)
[20:20:48.309535] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=6)
[20:20:48.309552] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=7)
[20:20:48.309571] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=8)
[20:20:48.309589] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=9)
[20:20:48.309616] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=10)
[20:20:48.309635] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=11)
[20:20:48.309653] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=12)
[20:20:48.309670] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=13)
[20:20:48.309707] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=14)
[20:20:48.309727] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=15)
[20:20:48.309744] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=16)
[20:20:48.309826] [dll] sane_control_option(handle=0x561860528a40,option=9,action=1,value=0x7ffe73f77e
70,info=0x7ffe73f77e84)
[20:20:48.309856] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=14)
[20:20:48.309874] [dll] sane_control_option(handle=0x561860528a40,option=14,action=1,value=0x7ffe73f77
e64,info=0x7ffe73f77e84)
[20:20:48.309905] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=10)
[20:20:48.309923] [dll] sane_control_option(handle=0x561860528a40,option=10,action=0,value=0x56186051d
470,info=(nil))
[20:20:48.309949] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=11)
[20:20:48.309966] [dll] sane_control_option(handle=0x561860528a40,option=11,action=0,value=0x56186051d
470,info=(nil))
[20:20:48.309989] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=12)
[20:20:48.310006] [dll] sane_control_option(handle=0x561860528a40,option=12,action=0,value=0x56186051d
470,info=(nil))
[20:20:48.310029] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=13)
[20:20:48.310046] [dll] sane_control_option(handle=0x561860528a40,option=13,action=0,value=0x56186051d
470,info=(nil))
[20:20:48.310096] [dll] sane_control_option(handle=0x561860528a40,option=9,action=1,value=0x7ffe73f77e
70,info=0x7ffe73f77e84)
[20:20:48.310127] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=7)
[20:20:48.310145] [dll] sane_control_option(handle=0x561860528a40,option=7,action=1,value=0x5618605287
70,info=0x7ffe73f77e84)
Resolution: 300dpi
Mode: gray
Compression: JPEG
Scan area (mm):
Top left (x,y): (0.000000mm, 0.000000mm)
Bottom right (x,y): (215.900009mm, 297.010681mm)
Width: 215.900009mm
Height: 297.010681mm
Destination(s): file
Output file:
[20:20:48.310757] [dll] sane_control_option(handle=0x561860528a40,option=9,action=1,value=0x7ffe73f77e
70,info=0x7ffe73f77e84)
[20:20:48.310796] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=2)
[20:20:48.310815] [dll] sane_control_option(handle=0x561860528a40,option=2,action=1,value=0x561860529e
40,info=0x7ffe73f77e84)
[20:20:48.310846] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=1)
[20:20:48.310867] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=2)
[20:20:48.310886] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=3)
[20:20:48.310911] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=4)
[20:20:48.310930] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=5)
[20:20:48.310947] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=6)
[20:20:48.310965] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=7)
[20:20:48.310983] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=8)
[20:20:48.311001] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=9)
[20:20:48.311019] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=10)
[20:20:48.311037] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=11)
[20:20:48.311055] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=12)
[20:20:48.311073] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=13)
[20:20:48.311091] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=14)
[20:20:48.311109] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=15)
[20:20:48.311126] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=16)
[20:20:48.311202] [dll] sane_control_option(handle=0x561860528a40,option=9,action=1,value=0x7ffe73f77e
70,info=0x7ffe73f77e84)
[20:20:48.311234] [dll] sane_get_option_descriptor(handle=0x561860528a40,option=3)
[20:20:48.311252] [dll] sane_control_option(handle=0x561860528a40,option=3,action=1,value=0x7ffe73f77e
64,info=0x7ffe73f77e84)
**warning: File destination enabled with no output file specified.**
Setting output format to PNG for greyscale mode.
**warning: Defaulting to '/home/farcus/hpscan001.png'.**
Warming up...
Scanning...
[20:20:48.313318] [dll] sane_start(handle=0x561860528a40)
**error: SANE: Device busy (code=3)**
Closing device.
[20:20:48.428539] [dll] sane_cancel(handle=0x561860528a40)
[20:20:48.443990] [dll] sane_close(handle=0x561860528a40)