plustek: Plustek 9636T scans color/grey incorrectly
Subject:
Re: Plustek 9636T scans color/grey incorrectly
From:
Mark Bratcher ####@####.####
Date:
22 Jan 2001 11:45:03 -0000
Message-Id: <3A6C1E2E.A355BE8F@rochester.rr.com>
Gerhard,
Thanks for the prompt reply.
> - is there a printer attached to the scanner?
No
> - are you using version 0.37 of the driver?
Yes
> - can you send us the output of cat /proc/pt_drv/device0/info?
Model : 9636T/12000T
Portaddress : 0x378
Portmode : EPP
Buttons : 0
Warmuptime : 30s
Lamp timeout: 180s
mov-switch : 0
I/O-delay : 0
CCD-Type : 3797
> - is your parallelport switched to plain EPP mode in BIOS?
Yes
Also, just fyi, my parallel cable is 4 feet long (not very long).
> This problem is quite strange, because the ASI98001 based models
> in general won't loose data.
I thought that was the case. I'm having trouble understanding the
problem. Even on the Preview the image is corrupted. If I just do
consecutive previews, the corruption is different each time. Sometimes I
get vertical cyan and magenta stripes in white areas. Sometimes white
areas are OK, but vertical black lines, for example, have a cyan shadow
or ghost.
Mark
>
> On Son, 21 Jan 2001, Mark Bratcher wrote:
> > Hi.
> >
> > I have Linux kernel 2.4.0 and the latest official Sane and Plustek
> > driver (pt_drv) downloads as of 1/20/2001.
> >
> > I installed everything OK as far as I can tell, and I can scan images.
> > However, only pure black and white images come out OK. Color and
> > greyscale are blurred, or more specifically, the different color/grey
> > "planes" are offset from one another. The offset is not consisten from
> > scan line to scan line, so it's as if it were a data loss problem (?).
> >
> > Anyway, I'm running a Pentium II / 233MHz and 128MB RAM. I have nothing
> > else running while scanning.
> >
> > Just as a note: I had the same problem under the 2.2.17 kernel. And the
> > scanner runs fine under Windows 95.
> >
> > Thanks for any helpful input.
> >
> > --
> > Mark Bratcher
> > ####@####.####
> > ---------------------------------------------------------
> > Escape from Microsoft's proprietary tentacles: use Linux!
>
>
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