The capture in WireShark format.

** Attachment added: "Kalibrierung_3.pcapng"
   
https://bugs.launchpad.net/ubuntu/+source/colord/+bug/2088294/+attachment/5837500/+files/Kalibrierung_3.pcapng

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https://bugs.launchpad.net/bugs/2088294

Title:
  colord-sane prevents connection to USB scanner

Status in colord package in Ubuntu:
  New

Bug description:
  I have here the slide scanner ‘Braun MultiMag SlideScan 6000’. When I connect 
it and switch it on, the colord-sane process is started during its approx. 
2-minute self-calibration, which then disappears again. After that, the device 
is no longer listed via lsusb, so presumably the USB port is switched off. Even 
running the scan application does not prevent this. It is still recognised 
before the 2 minutes have elapsed:
  $ lsusb
  [.....]
  Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  [.....]
  Bus 003 Device 008: ID 05e3:0142 Genesys Logic, Inc. Multiple Slides 
Scanner-3600

  The only way to connect the scanner permanently and then use it is to
  connect the scanner to USB only after it's self-calibration. Then
  colord-sane will no longer be started. However, this obviously
  prevents the use of colour management.

  IMHO, it should not be the task of the colour management to switch off
  USB ports.

  I attach the USB capture with WireShark.

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