This is due to color management. I think I filed a bug report on the Gnome bugtracker with slightly different information, but regarding brightness jumping from 0 to ~5 out of 255:
According to http://www.lagom.nl/lcd-test/black.php, with 6-bit dithering, usually "the darkest four shades (0, 1, 2, 3) all are displayed as black regardless of the monitor settings." Most models of my laptop didn't have LED backlights, and maybe the default color profile for my laptop model was intended for those non-LED backlights. Although my screen is 6-bit, shades 1~3 are still discernible. In any case, turning off color management fixed the problem for eog, and presumably for Firefox as well after a restart. ** Changed in: eog (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1436595 Title: Images too bright To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/eog/+bug/1436595/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
