Volume control hotkeys don’t work while a popup menu is open in any application
Binary package hint: gnome-settings-
My laptop’s volume up/down/mute keys work just fine most of the time, but *not* when any application has a popup menu open. This includes the panel main menu, any application menu, a right-click context menu, the Firefox address bar, etc.
I’m using Jaunty amd64, but I think I’ve seen this in many previous Ubuntu releases too.