Hi,

thank you very much. It was the right command.

> scanimage -L

but it didn’t find a scanner:

No scanners were identified

-------------------------------------------------------

with sudo it found my printer/scanner

>> sudo scanimage -L
>> Passwort: 
>> device `hpaio:/usb/Officejet_J4500_series?serial=CN92G561F4052T' is a Hewlett-Packard Officejet_J4500_series all-in-one
> 

--------------------------------------------------------
"sudo sane-find-scanner"

>  # No SCSI scanners found. If you expected something different, make sure that
>   # you have loaded a kernel SCSI driver for your SCSI adapter.

> found USB scanner (vendor=0x03f0 [HP], product=0x2a12 [Officejet J4500 series]) at libusb:003:006
> could not fetch string descriptor: Pipe error
> could not fetch string descriptor: Pipe error
>   # Your USB scanner was (probably) detected. It may or may not be supported by
>   # SANE. Try scanimage -L and read the backend's manpage.
>   # Not checking for parallel port scanners.
> 
>   # Most Scanners connected to the parallel port or other proprietary ports
>   # can't be detected by this program.


it found a usb scanner, but could not fetch string descriptor.

1.
does this message say that proprietary software is the problem?

-------------------------------------------------------------------
> Please read the documentation
> which came with this software (README, FAQ, manpages).

2.
Can I read documentation with the terminal, having no documentation on 
paper? Which commands I have to use?


-----------------------------------------------------------------
Kind regards

Gottfried



Am 26.02.23 um 15:16 schrieb Felix Lechner:
> Hi Gottfried,
> 
> On Sat, Feb 25, 2023 at 1:41 AM Gottfried <gottfried@posteo.de> wrote:
>>
>> How would be the command to use libsane directly in the terminal?
> 
> I think the command to list the detected scanners is 'scanimage -L'
> but my memory isn't perfect. It would be best to consult the
> documentation.
> 
> Kind regards
> Felix Lechner

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