I bet the change of volume level in mplayer is also changing the system wide volume. It happens because you are not using software mixing. To enable it in GUI version of mplayer (gmplayer) go to Preferences/Audio and tick "Enable Software Mixer" option.
If you use the no gui version you need to modify ./mplayer/config file. Add the line: softvol = "yes" -- muting sound in mplayer causes rhythmbox to mute https://bugs.launchpad.net/bugs/107751 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs