[sane-devel] sane-find-scanner finds Canon Canoscan N24OU, scanimage -L does not

[Terry Spearman]

Hi Olaf,

 

Yes, I tried running scanimage -L when logged on as root with the same
result i.e. "No scanners were identified...."

 

Since my original post I made an observation which may or may not be
relevant. From the Centos 7.0 man page for plustek,
https://www.unix.com/man-page/centos/5/sane-plustek/

 

"FILES

 

/etc/sane.d/plustek.conf

The backend configuration file

 

/usr/lib64/sane/libsane-plustek.a

The static library implementing this backend.

 

/usr/lib64/sane/libsane-plustek.so

The shared library implementing this backend (present on systems that
support dynamic loading)."

 

On my system I'm seeing /etc/sane.d/plustek.conf but /usr/lib64/sane is
empty.  I've seen something somewhere that says if sane-find-scanner finds
the scanner but scanimage -L does not it means that you don't have the right
backend for the scanner installed.  Could a missing library file be the
culprit?

 

I should mention that, if it is not already obvious, I'm a relative Linux
newbie.  As always, any suggestions appreciated.

 

-----Original Message-----

From: Olaf Meeuwissen [mailto:paddy-hack at member.fsf.org]

Sent: Saturday, October 27, 2018 11:40 PM

To: Terry Spearman

Cc: sane-devel at alioth-lists.debian.net

Subject: Re: [sane-devel] sane-find-scanner finds Canon Canoscan N24OU,
scanimage -L does not

 

Hi Terry,

 

Terry Spearman writes:

 

> I'm running under Centos 7 (kernel 3.10.0-862.14.4.e17x86_64) and the 

> version of SANE I downloaded from the Centos repository via yum install.

> When I run sane-find-scanner -v -v it tells me "found USB scanner

> (vendor=0x0a9 [Canon], product= 0x220e [CanoScan] at libusb:001:002", 

> but, after checking several possibilities, says: <Couldn't determine 

> the type of USB chip (result from sane-backends 1.0.24)>.

 

Device reported as completely supported with 1.0.24, so should work.

 

> Running scanimage -L tells me "No scanners were identified.....".

> [...]

> I'm pretty much out of ideas.  Any and all suggestions gratefully 

> received

 

Have you tried with root permissions?  The user trying to scan needs read
and write access to the device.

 

Hope this helps,

--

Olaf Meeuwissen, LPIC-2            FSF Associate Member since 2004-01-27

GnuPG key: F84A2DD9/B3C0 2F47 EA19 64F4 9F13  F43E B8A4 A88A F84A 2DD9

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