# Re: backtracking problem

From: Henning Meier-Geinitz (hmg-ml@gmx.de)
Date: Thu Sep 21 2000 - 09:21:46 PDT

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  Hi,

  On Thu, Sep 21, 2000 at 11:51:41AM +0200, Ivo wrote:
  > Well, now that you mention it, at low resolutions and small widths,
  > backtracking does not seem to occur. But when I increase the scan width with
  > the same resolution, it will happen. If I up the resolution with the same small
  > width, backtracking also occurs; and scanning is very slow, but that could be
  > normal, i.e. even so with the Windows driver (haven't tried).

  The behaviour is the same with windows but backtracking doesn't happen so
  often.
  > > > and as you can see in the debug output, buffersize is increased to 1024
  > > > kb by the mustek backend.
  > > I don't think this will help with ScanExpress/ScanMagic scanners. They like
  > > their standard 64 K blocksize.
  >
  > But it won't have a negative effect either?

  Probably it won't. However, with The ScanExpress/ScanMagic 1.x scanners a buffersize
  >64 k may lead to a total freeeze of the scanner.

  Bye,
  Henning

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