Pascal, I'm not convinced that the same "bug". Do you have the focus on the slider widget (like dot border around it)? The original bug seems to describe the use of volume keys, not "+" or "-" on the keyboard, are you sure that's the same bug?
-- Keyboard Volume Buttons Don't Work While Volume Control Open https://launchpad.net/bugs/51911 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs