senza audio su fedora

[lorty]

Ho comprato un portatile qualche giorno fa e ci ho installato sia la fedora core 6 che la 7...ma l'audio non ha mai funzionato perchè non riconosceva la scheda audio. Ora che ho installato la 8 finalmente la riconosce ma ancora niente audio...se apro vlc la barra scorre ma dalle casse non esce alcun suono, è la prima volta che ho un portatile...devono essere attivate casse o suono in qualche modo dal bios?.

Con lspci:
[root@localhost ~]# lspci
00:00.0 RAM memory: nVidia Corporation Unknown device 0547 (rev a2)
00:01.0 ISA bridge: nVidia Corporation Unknown device 0548 (rev a2)
00:01.1 SMBus: nVidia Corporation Unknown device 0542 (rev a2)
00:01.2 RAM memory: nVidia Corporation Unknown device 0541 (rev a2)
00:01.3 Co-processor: nVidia Corporation Unknown device 0543 (rev a2)
00:02.0 USB Controller: nVidia Corporation Unknown device 055e (rev a2)
00:02.1 USB Controller: nVidia Corporation Unknown device 055f (rev a2)
00:04.0 USB Controller: nVidia Corporation Unknown device 055e (rev a2)
00:04.1 USB Controller: nVidia Corporation Unknown device 055f (rev a2)
00:06.0 IDE interface: nVidia Corporation Unknown device 0560 (rev a1)
00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1)
00:08.0 PCI bridge: nVidia Corporation Unknown device 0561 (rev a2)
00:09.0 IDE interface: nVidia Corporation Unknown device 0550 (rev a2)
00:0a.0 Ethernet controller: nVidia Corporation Unknown device 054c (rev a2)
00:0c.0 PCI bridge: nVidia Corporation Unknown device 0563 (rev a2)
00:0d.0 PCI bridge: nVidia Corporation Unknown device 0563 (rev a2)
00:12.0 VGA compatible controller: nVidia Corporation Unknown device 0533 (rev a2)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
05:00.0 Ethernet controller: Atheros Communications, Inc. AR5006EG 802.11 b/g Wireless PCI Express Adapter (rev 01)
Ovviamente dando da root: alsamixer la barra è al massimo...
Come posso fare?