brightness, contrast for Canon LIDE 110 not working

[Rik Shaw]

I greatly appreciate the added sliders for brightness, contrast, and quality in the simple-scan preferences.

However, for my scanner, they seem to have no effect, and resulting scans of color text documents are still very gray, just as when the brightness and contrast are set to the default values, or in prior version of simple-scan that did not have the sliders.

My scanner is a Canon Canoscan LIDE 110.

Using xsane, I can easily adjust the brightness and contrast, so I don't believe it is a problem with the scanner itself, but I am happy to perform any tests.

I am using simple-scan 3.12.1 in Trusty.

[Alexandre (ipipomme)]

Hi,

I have a Canon CanoScan 9000F Mark II and have the same problem: the sliders do not work.

My version of Simple Scan is 3.12.0
I use Archlinux, with a kernel 3.16.3-1 x86_amd64, and Gnome 3.12.2

Kind Regards.

[Ivan Lucchese (ivan-lucchese)]

Scanner: Acer Acerscan 620S, SCSI scanner
Ubuntu 14.04, Simple Scan version 3.12.1

Same here.
In xsane and gscan2pdf brightness and contrast do work.
Adding as attachment an error-log

[Launchpad Janitor (janitor)]

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

[penalvch (penalvch)]

Rik Shaw, thank you for reporting this and helping make Ubuntu better.

To see if this is already resolved, could you please test http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?

[Jens Schröder (jens-vnw)]

I'm using a Canon Lide 60 scanner in combination with Simple Scan 3.20.0 on Xubuntu 16.04 .
Appearently someone mixed up the direction of the sliders, i.e. if you want to scan darker you now have to move the slider towards "brighter". Same with "contrast" and possibly "quality".

[penalvch (penalvch)]

Jens Schröder, it will help immensely if you filed a new report with Ubuntu via a terminal:
ubuntu-bug simple-scan

Please feel free to subscribe me to it.

For more on why this is helpful, please see https://wiki.ubuntu.com/ReportingBugs.

[Rik Shaw (rik-shaw)]

Brightness and Contrast adjustments for Canon LiDE 110 in Ubuntu 16.04, simple-scan 3.20.0-0ubuntu1 work perfectly! So I think this specific bug is solved, even though others with different scanner models are reporting problems.

[penalvch (penalvch)]

Rik Shaw, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/simple-scan/+bug/1340161/comments/7 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.