Simple Scan stopped working when I upgraded from 14.04 LTS to 18.04 LTS
I used Simple Scan all the time when I was running Trusty Tahr 14.04 LTS. After I recently upgraded to Bionic Beaver 18.04 LTS Simple Scan doesn't work, no other change to the computer system hardware. When I click to open nothing happens. Latest version was installed according to the Ubuntu Software store. I removed it, rebooted, and re-installed. No change.
Device being used for scanning was a Canon MF4150. Works fine for printing under Bionic Beaver. Scanner also works fine with VueScan. Seems like the problem is related to Simple Scan and not the scanner itself.