'Twas brillig, and Marie-No?lle Augendre at 10/06/11 10:07 did gyre and gimble: > sudo fuser -v /dev/snd/pcm* > > > UTIL. PID ACC?S COMMANDE > /dev/snd/pcmC0D0p: marie-noelle 3119 F...m plugin-containe > /dev/snd/pcmC1D3p: marie-noelle 2375 F...m pulseaudio OK, so pcmC0 is your built in card and pcmC1 is the HDMI As you can see PA has the HDMI card open and "plugin-container" (which is firefox's plugin sandbox) has your built in card open. THis means that firefox (or rather it's plugins - typically flash) has opened the sound card hardware directly. This is bad and is a misconfiguration. It should be opening the alsa-default device which should in turn be using PA. If you do: aplay /usr/share/sounds/alsa/Front_Center.wav (assuming that file exists which it should if you have speaker-test installed) While you run the above command, (which will only stay running for a little while so have two terminals open and be prepared to type the other command quickly) what does the "sudo fuser -v /dev/snd/pcm*" say? You might need to stop firefox. If you find that aplay is now using pcmC0D0p, then your alsa configuration is broken. If it uses PulseAudio, then you should either: a) hear the sound, or b) aplay should show up in "pacmd ls" if run while aplay is running. If it does show up in pacmd ls output, please attach it here. Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mageia Contributor [http://www.mageia.org/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]