Stuckey <james.stuc...@stud-mail.uni-wuerzburg.de> wrote:

Hi,

> When I scan images I frequently get output that looks similar to this:
> http://jhstuckey.com/book-error.jpeg

Wow :) Now there's something going on here!

> It always involves a normal half and a tinted half, and athough the
> tinted half is not always pink it does seems to always be a bright
> color (like yellow or orange).

Looks like some image data goes missing at some point, shifting the rest
of the image data (think RGB ...).

> Secondly, scanning typically takes a few minutes, even if done at low
> resolution. When I hit scan I hear a "click", and then maybe 90
> seconds later the scan-arm starts to move. Is this delay normal?

I don't know about the delay, as I don't own this scanner. However, the
very slow scan looks very suspicious.

Given that the plustek backend hasn't seen any new development for some
time now, it's doubtful that it's a bug in the backend.

There are some simple steps you can perform to troubleshoot the issue:
 - if your setup involves a USB hub between the scanner and the host,
   get rid of the hub

 - check that the scanner is plugged into a USB 2.0 port; the scanner
   being plugged into a 1.0/1.1 port could explain the slow scans

 - if the scanner doesn't have its own power supply (meaning it's
   powered by the USB bus), try removing all the other USB devices
   (except keyboard/mouse) to ensure it's not a power supply issue. If
   the scanner has a port for an external power supply, you can try
   that, too

 - try another, known-good, USB 2.0 cable

 - if all else fails, try to find a Windows machine to which you can
   hook the scanner up and try it out.

JB.

-- 
 Julien BLACHE - Debian & GNU/Linux Developer - <jbla...@debian.org> 
 
 Public key available on <http://www.jblache.org> - KeyID: F5D6 5169 
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