http://bugzilla.suse.com/show_bug.cgi?id=1172412 http://bugzilla.suse.com/show_bug.cgi?id=1172412#c2 --- Comment #2 from Takashi Iwai <tiwai@suse.com> --- The percentage is a bogus number and cannot be used for judging the loudness in general. The USB audio specifies the volume in 1/100 dB unit, and most likely your firmware is buggy and provides a wrong dB value for the playback volume. Looking at the alsa-info.sh output: state.Quadcast { ..... control.6 { iface MIXER name 'Speaker Playback Volume' value.0 1 value.1 1 comment { access 'read write' type INTEGER count 2 range '0 - 31' dbmin -4000 dbmax -900 dbvalue.0 -3900 dbvalue.1 -3900 } } So the control receives the raw value from 0 to 31 corresponding the dB level from -40dB to -9dB. This looks already strange. Could you check whether you get any signal if you set the raw value greater than 0? e.g. amixer -c0 cset name='Speaker Playback Volume' 0,0 should set the values to 0 and it's likely the silence. Then amixer -c0 cset name='Speaker Playback Volume' 1,1 and check whether you get some output at all. Then increase the value and confirm that you have higher corresponding volume. Then the next step is identify the real loudness (in dB level) to each raw value. At best, compare the output level with other device. You might be able to compare with the output from the onboard audio, too. -- You are receiving this mail because: You are on the CC list for the bug.