Maybe this is a feature(?) of Gnome3.12. Here is another thread without any clue or solution about that issue: http://ubuntuforums.org/showthread.php?t=2210251
-- You received this bug notification because you are a member of DX Packages, which is subscribed to notification-daemon in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1296694 Title: No OSD when adjusting brightness and volume Status in “notification-daemon” package in Ubuntu: Confirmed Bug description: I am using Ubuntu Gnome 14.04 with everything functioning so far, but after (?) installing evolution, the OSD does not show up anymore when I adjust the brightness and volume. Both functions perfectly fine, but the OSD is missing now. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: notification-daemon 0.7.6-1 ProcVersionSignature: Ubuntu 3.13.0-19.39-generic 3.13.6 Uname: Linux 3.13.0-19-generic x86_64 ApportVersion: 2.13.3-0ubuntu1 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Mar 24 13:30:18 2014 InstallationDate: Installed on 2014-03-04 (20 days ago) InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226) SourcePackage: notification-daemon UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/notification-daemon/+bug/1296694/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp