The sound can be muted anyway. I should add I am using asus laptop. Soundcard is HDA NVidia (Alsa mixer) and as a track to be controlled via keyboard is selected PCM. Now, there is another problem. Today I tried it again and there is no OSD showing the volume level while adjusting the volume on keyboard. The volume is changed, but the progress isn't shown.
-- [Feisty] increase volume on keyboard https://launchpad.net/bugs/83621 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs