[sane-devel] Epson Perfection 1250/Photo 64-bit

[Charles Lindsey]

On 14/09/2020 15:29, Ralph Little wrote:
> Hi,
> 
> On 2020-09-14 6:49 a.m., Charles Lindsey wrote:
>>

>> I am using Ubuntu Bionic LTS, and Ubuntu says its version is
>> 0.999-5ubuntu2.
>> Ubuntu Focal LTS (which I believe uses 1.0.31) says its version is
>> 0.999-8ubuntu2, and that may be closer to what you are using. I could
>> easily download the source and compile either of those. Looking at the
>> output of "nm -nD `which xsane`", it would seem that it calls
>> sane_read (or maybe sane_start) to actually set a scan in progress.
>>
> 
> Well we can establish what versions of the backends that xsane is using
> by looking at the diag output.
> xsane should be using exactly the same backends as scanimage.
> 

I have cracked it; well, sort of.

Still using my old 0.999-5ubuntu2 version of xsane.
Clearly, the preview uses a low resolution scan. So I tried doing a full scan at 
various resolutions.

50 dpi - banding seen
75 dpi - banding seen
100 dpi - banding seen
150 dpi - no banding

I an still planning to download and compile the newer 0.999-8ubuntu2 version of 
xsane (but not today). In the meantime, I suggest you try the same experiment on 
your Epson 1260.

Using Simple Scan, I got no banding at either 75 dpi or 150 dpi, so I still 
think it is an xsane problem.

-- 
Charles H. Lindsey ---------At my New Home, still doing my own thing------
Tel: +44 161 488 1845                    Web: http://www.cs.man.ac.uk/~chl
Email: chl at clerew.man.ac.uk              Snail-mail: Apt 40, SK8 5BF, U.K.
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