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help me .........sound is not audible :(

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http://forums.fedoraforum.org – here is the output of uname -a lspci lsmod uname -a Linux varunnegi.com 2.6.31.5-127.fc12.i686.PAE #1 SMP Sat Nov 7 21:25:57 EST 2009 i686 athlon i386 GNU/Linux lspci 00:00.0 RAM memory: nVidia Corporation MCP67 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP67 ISA Bridge (rev a2) 00:01.1 SMBus: nVidia Corporation MCP67 SMBus (rev a2) 00:01.2 RAM memory: nVidia Corporation MCP67 Memory Controller (rev a2) 00:01.3 Co-processor: nVidia Corporation MCP67 Co-processor (rev a2) 00:02.0 USB Controller: nVidia Corporation MCP67 OHCI USB 1.1 Controller (rev a2) 00:02.1 USB Controller: nVidia Corporation MCP67 EHCI USB 2.0 Controller (rev a2) 00:04.0 USB Controller: nVidia Corporation MCP67 OHCI USB 1.1 Controller (rev a2) 00:04.1 USB Controller: nVidia Corporation MCP67 EHCI USB 2.0 Controller (rev a2) 00:06.0 IDE interface: nVidia Corporation MCP67 IDE Controller (rev a1) 00:08.0 PCI bridge: nVidia Corporation MCP67 PCI Bridge (rev a2) 00:09.0 IDE interface: nVidia Corporation MCP67 AHCI Controller (rev a2) 00:0a.0 Ethernet controller: nVidia Corporation MCP67 Ethernet (rev a2) 00:0c.0 PCI bridge: nVidia Corporation MCP67 PCI Express Bridge (rev a2) 00:0d.0 PCI bridge: nVidia Corporation MCP67 PCI Express Bridge (rev a2) 00:12.0 VGA compatible controller: nVidia Corporation GeForce 7000M (rev a2) (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 02:05.0 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22) 02:05.1 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12) 02:05.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12) 02:05.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 12) 03:00.0 Ethernet controller: Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter (rev 01) lsmod Module Size Used by fuse 52712 2 ipt_MASQUERADE 2788 1 iptable_nat 6068 1 nf_nat 18008 2 ipt_MASQUERADE,iptable_nat bridge 43992 0 stp 1988 1 bridge llc 4960 2 bridge,stp sunrpc 158388 1 xt_physdev 2064 1 ip6t_REJECT 4620 2 nf_conntrack_ipv6 17548 2 ip6table_filter 3168 1 ip6_tables 11144 1 ip6table_filter ipv6 239428 24 ip6t_REJECT,nf_conntrack_ipv6 cpufreq_ondemand 6160 1 powernow_k8 14984 1 dm_multipath 14472 0 kvm 140260 0 uinput 6852 0 arc4 1616 2 ecb 2492 2 uvcvideo 51144 0 ath5k 129768 0 videodev 30160 1 uvcvideo mac80211 149776 1 ath5k v4l1_compat 12312 2 uvcvideo,videodev sdhci_pci 7156 0 sdhci 17552 1 sdhci_pci ath 7068 1 ath5k ricoh_mmc 3452 0 cfg80211 73044 3 ath5k,mac80211,ath mmc_core 48656 1 sdhci forcedeth 48164 0 rfkill 16220 1 cfg80211 i2c_nforce2 7368 0 k8temp 4052 0 joydev 9320 0 wmi 5952 0 ata_generic 4320 0 pata_acpi 3676 0 pata_amd 9980 0 video 19088 0 output 2468 1 video nouveau 499356 0 ttm 34264 1 nouveau drm_kms_helper 22688 1 nouveau drm 135064 3 nouveau,ttm,drm_kms_helper i2c_algo_bit 4820 1 nouveau i2c_core 23120 5 videodev,i2c_nforce2,nouveau,drm,i2c_algo_bit (HowTos)