Bightness and contrast settings have no effect

Bug #1327801 reported by Heiko L on 2014-06-08
This bug affects 9 people
Affects Status Importance Assigned to Milestone
simple-scan (Ubuntu)

Bug Description

Scanner: Canon, Inc. CanoScan N1240U/LiDE 30
Ubuntu 14.04, Simple Scan version 3.12.1.

Adjusting the settings of brightness and contrast has no effect.

With the default for scanning in "text" mode being too bright, this makes "Simple Scan" in text mode unusable for me.
Brightness and contrast settings don't work in "foto" mode, too. But the default of the foto mode is usable.

Brightness setting does work in program "Skanlite".

Ivan Lucchese (ivan-lucchese) wrote :

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) wrote :

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

Changed in simple-scan (Ubuntu):
status: New → Confirmed
tags: added: brightness contrast
Ivan Lucchese (ivan-lucchese) wrote :

As reported in Bug #1340161 (marked as duplicate), the same problem happens with the following scanners:

-Canon Canoscan LIDE 110 (thanks Rik Shaw )
-Canon CanoScan 9000F Mark II (thanks Alexandre (ipipomme) )

Changed in simple-scan:
status: New → Confirmed
Etamuk (trmfach) wrote :

I can confirm the problem on this scanners:

Canon Lide 25 (Flat bed scanner
Canon MX 925 (Multi function device)

Simple Scan is great and easy to use. But i miss good scan results for color-scans.

Heiko L, thank you for reporting this and helping make Ubuntu better.

To see if this is already resolved, could you please test and advise to the results?

no longer affects: simple-scan (Ubuntu)
affects: simple-scan → simple-scan (Ubuntu)
Changed in simple-scan (Ubuntu):
status: Confirmed → Incomplete
importance: Undecided → Low
Heiko L (hl1) wrote :

Sorry for the late response.
I tested today's cdimage (daily-live).
Unfortunately, the issue has not changed.
Still: Brightness and contrast settings have no effect.
(Tested with the same old scanner "Canon, Inc. CanoScan N1240U/LiDE 30".)

tags: added: trusty yakkety
Changed in simple-scan (Ubuntu):
status: Incomplete → Triaged
Julien (jlab) wrote :

Same problem for me with Canon MP550 (scanner + printer) with Ubuntu Gnome 16.10.

Rik Shaw (rik-shaw) wrote :

As reported at Bug #1340161 the problem is solved for a Canon LiDE 110 scanner using Ubuntu 16.04 and simple-scan 3.20.0=0ubuntu1

I have the same issue on an HP Photosmart C4795. As mentioned, xsane works just fine.

Rolf Leggewie (r0lf) wrote :

I cannot confirm this in bionic with a Canon LiDE 35.

If you are still affected in bionic or later, please speak up.

Johann Schoonees (johann-m) wrote :

Same issue in Brother MFC-J470DW: brightness and contrast settings have no effect.
Xubuntu 16.04 LTS 4.4.0-128-generic #154-Ubuntu SMP i686
Simple Scan 3.20.0

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