I've just been testing this and it seems that sane / driver doesn't
check for the end of track correctly when returning the scanner element
to the start of the track after a scan.

This means that the scanner element gets rammed into the start of the
track and you can hear the motor screaming in pain as it tries to push
against an immovable object.

If you listen you will hear a high pitched humming noise at this point
as the scanner desperately tries to move the optical sensor (scanner
element)

I presume this triggers some sort of fail safe / over current protection
which kills the scanner motor and resets the scanner. Effectively
causing the behaviour everyone is observing.

This has the potential to break the motor and scanner.

On windows with MP_Navigator EX4.0 (Canon's Software) this does not
happen.

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https://bugs.launchpad.net/bugs/1184699

Title:
  Canon LIDE 110 can only scan once, then I need to replug the usb cable

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