Pb son Linux mandriva

Bonjour,

J'ai un pb de son, les players fonctionnent mais je n'entends pas le son

J'ai déja lancé les commandes suivantes :

[paul@localhost ~]$ cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xe20c0000 irq 16
1 [U0x4710x311 ]: USB-Audio - USB Device 0x471:0x311
USB Device 0x471:0x311 at usb-0000:00:1d.2-1, full speed

[paul@localhost ~]$ rpmquery --requires alsaconf
alsa-utils
newt
cdialog
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1
bash

[paul@localhost ~]$ urpmq --list-media
avast
update_source
Main (Official2007.1-1)
Main Updates (Official2007.1-2)
Main Testing (Official2007.1-3)
Main Backports (Official2007.1-4)
Contrib (Official2007.1-5)
Contrib Updates (Official2007.1-6)
Contrib Testing (Official2007.1-7)
Contrib Backports (Official2007.1-8)
Non-free (Official2007.1-9)
Non-free Updates (Official2007.1-10)
Non-free Testing (Official2007.1-11)
Non-free Backports (Official2007.1-12)
update_source2
Main (Official2007.1-13)
Main Updates (Official2007.1-14)
Main Testing (Official2007.1-15)
Main Backports (Official2007.1-16)
Contrib (Official2007.1-17)
Contrib Updates (Official2007.1-18)
Contrib Testing (Official2007.1-19)
Contrib Backports (Official2007.1-20)
Non-free (Official2007.1-21)
Non-free Updates (Official2007.1-22)
Non-free Testing (Official2007.1-23)
Non-free Backports (Official2007.1-24)

Merci

Configuration: Linux Mandriva
Firefox 2.0.0.8