Scanning from a Duplex source from 276dw doesn't return the full amount of data

[Dmitry]

Using Ubuntu 16.04 32-bit
HPLIP 3.16.5
HP 276dw
Custom SANE-based scan utility (libSANE+Qt just for image manipulation, attached)

I am able to scan from a Duplex source. sane_get_parameters() reports that the image parameters are:

bytes_per_line: 1911
pixels_per_line: 637
lines: 1050

So I expect 1911*1050 = 2'006'550 bytes from the scanner for a single page. However after reporting SANE_STATUS_EOF I have only 1'589'952 bytes stored in a buffer.

The same app works just fine with Epson scanners.

[kritika arora (kritika-arora1)]

Hi ,

Please download the latest hplip-3.15.11.run file from: http://hplipopensource.com/hplip-web/gethplip.html.

Run command 'sh hplip-3.15.11.run' in terminal to re-install the hplip package as some of the dependencies are not installed.

Write back if the issue continues.

Thanks,
kritika

[Dmitry (dmitrymq)]

Hi. I've installed 3.16.11 from Zesty (http://packages.ubuntu.com/zesty/hplip , recompiled with debuild) with no luck, the error is the same.

>as some of the dependencies are not installed

Which dependencies do I need to install?

[kritika arora (kritika-arora1)]

Hi,

Regret the delay in response.

You are requested to include the below mentioned line of code in main.cpp.

params.lines = total/params.bytes_per_line; just before image() function call.

as the default calculated values of length and width are taken as maximum, which is making the scanned image uneven.

Thanks,
kritika