[Bug 1096612] Re: canon pixma MP970 TPU scanning stopped working

[Rolf Bensch]

I prepared a ppa for SANE daily git snapshots here:
https://launchpad.net/~rolfbensch/+archive/sane-git.

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https://bugs.launchpad.net/bugs/1096612

Title:
  canon pixma MP970 TPU scanning stopped working

Status in “sane-backends” package in Ubuntu:
  Confirmed

Bug description:
  The scanning with the transparency unit fails consistently with
  'operation was cancelled'.

  I downloaded the source from http://git.debian.org/?p=sane/sane-
  backends.git and used git bisect to find the first failing commit.

  The commit causing the bug is

  9fc0ac9d1bf771510e11815a9ffad309d29e49d1

  Author: Rolf Bensch <roben-guest at alioth.debian.org>  2012-04-04 15:15:18
  Committer: Rolf Bensch <roben-guest at alioth.debian.org>  2012-04-04 15:15:18
  Parent: 9c6afe1b95f47de2a9b2dd85b8f4171cc2ea0c93 (cropping y and h to scanable area in TPU mode)
  Child:  d723944fae0875e11e9c0b6147075d1a21b47080 (new scanners Canon Pixma MX510 and Canon Pixma MX890)
  Branches: master, remotes/origin/master
  Follows: RELEASE_1_0_22
  Precedes: RELEASE_1_0_23

      color and grayscale negatives scan in TPU mode
      for CS8800F and CS9000F

  I can see there are indeed some changes in the pixma code at this
  commit, but I don't know enough about the subject to see what's wrong.

  It would probably be better to report it directly ion the debian bug
  tracker of the sane project, but I don't feel like creating *yet
  another* online account just to report a bug.

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