# Re: Missing mustek backend maintainer, got patches?

From: Petter Reinholdtsen (pere@hungry.com)
Date: Sat Mar 04 2000 - 05:32:10 PST

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  [Alex Bond]
  > Hi
  >
  > I managed to achieve better Mustek SE12000 performance without
  > "forwards-backwards" by making the buffer size in mustek.c, i.e.
  > lines_per_buffer = 15603 (or up to 16800) / bpl;
  > for scanning at up to 300 and (sometimes?!) 600 dpi in Gayscale and
  > 75 dpi in color. The carriage does stop while scanning still, but as
  > there is no backward movement, the overall performance is much
  > better now!
  >
  > Well, I tried with the new sg.h to increase the SG_BIG_BUFF to 2MB
  > while setting in the backends
  > lines_per_buffer = scsi_max_req_sise / bpl;
  > The scanner (SE !!!) accepts it. And it scans with making 2M
  > requests. The backwards-forwards problem however persists. So it
  > looks like it is the sanei_scsi.c implementation that is being
  > guilty for not freeing the scanner's internal buffer properly.
  >
  > Another thing that I noticed is that in Win scanning at greater
  > resolution is done with physically slower carriage movement, which
  > is not the case with sane. The carriage tries to move fast, then the
  > internal buffer is (probably) filled and backwards-forwards
  > happens. It might be therefore possible that one somehow should try
  > n set the scanning speed (which is disabled in Mustek).
  >
  > Hope the above (empirical) information may be useful.
  >
  > Regards and Guessen,
  >
  > Alex Bond
  > alex831973@geocities.com

  I'm pretty sure the info is useful, and pass it on to the list.

  Please send such information directly to the list
  sane-devel@mostang.com the next time. :-)

  Happy hacking

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