"Operation was cancelled" when trying to use Transparency Unit in Canon 9000F Mark II

[Jelle De Loecker]

I'm trying to scan foto negatives using this command (that used to work in previous Ubuntu versions):

    scanimage --device-name pixma:04A9190D --source "Transparency Unit" --resolution "2400" --format "tiff" --mode Color -l 76 -x 66 > test.tiff

But I get this error:

    scanimage: sane_read: Operation was cancelled

Note: scanning regular images (using the Flatbed source) works fine.

My current ubuntu verison is Ubuntu 17.10

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Florian Haftmann (haftmann)]

The use of the transparency unit in Canon 9000F Mark II requires to take the regular white background away from the covering lid, beneath with the actual backlight of the transparency unit resides.

Any scanning attempt with the transparency unit as source while the backlight is hidden by the white background yields the error described above – which is, sadly, not very descriptly.

After taking way the background the transparency unit works like a charm.

@Jelle you might try whether this works for you.

[A. (1n3bw)]

I have confirmed that this a user issue rather than a bug. I was able to get the scanner to work if you properly perform the procedure and remove the white background piece. It unlatches and can be removed.