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 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to simple-scan in Ubuntu. https://bugs.launchpad.net/bugs/1327801 Title: Bightness and contrast settings have no effect Status in Simple Scan: Confirmed Status in “simple-scan” package in Ubuntu: Confirmed 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". To manage notifications about this bug go to: https://bugs.launchpad.net/simple-scan/+bug/1327801/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp