Hi, I am running a mythtv box based on Mandriva 2007 on a AMD 3200xp (Dual core) on an AM2 chipset. I am attempting to get surround sound audio out to my stereo via an optical s/pidf cable. With some help from kirberich && crimsum I adjusted the model= line in my modprobe.conf and applied the patch from http://hg-mirror.alsa-project.org/alsa-kernel?cmd=changeset;node=e51177a60747522a60bc1599aa5b2db22d4770a4;style=gitweb Unfortunately, I still am unable to get surround sound to work. The way we were testing this is with "speaker-test -Dplug:iec958 -c6" (note: iec958 and spdif are the same for this motherboard). I am getting sound from my left and right speakers, but nothing from anything else. So any more troubleshooting help would be greatly appreciated. Nasa Here comes the system info: uname -a Linux mythtv 2.6.17-5mdv #1 SMP Wed Sep 13 14:32:31 EDT 2006 i686 AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ GNU/Linux ALSA version 1.0.13 /sbin/lsmod|grep '^snd' snd_seq_dummy 3716 0 snd_seq_oss 33152 0 snd_seq_midi_event 7072 1 snd_seq_oss snd_seq 49488 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event snd_seq_device 7212 3 snd_seq_dummy,snd_seq_oss,snd_seq snd_pcm_oss 40576 0 snd_mixer_oss 16096 1 snd_pcm_oss snd_hda_intel 16440 0 snd_hda_codec 167072 1 snd_hda_intel snd_pcm 70116 3 snd_pcm_oss,snd_hda_intel,snd_hda_codec snd_timer 19620 2 snd_seq,snd_pcm snd_page_alloc 8712 2 snd_hda_intel,snd_pcm snd 47972 10 snd_seq_dummy,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel aplay -l **** List of PLAYBACK Hardware Devices **** card 0: NVidia [HDA NVidia], device 0: ALC883 Analog [ALC883 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 1: ALC883 Digital [ALC883 Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 scanpci: ... pci bus 0x0000 cardnum 0x06 function 0x01: vendor 0x10de device 0x0371 nVidia Corporation MCP55 High Definition Audio Simple mixer control 'Headphone',0 Capabilities: pswitch Playback channels: Front Left - Front Right Mono: Front Left: Playback [on] Front Right: Playback [on] Simple mixer control 'PCM',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Mono: Front Left: Playback 255 [100%] [0.00dB] Front Right: Playback 255 [100%] [0.00dB] Simple mixer control 'Front',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 25 [81%] [-9.00dB] [on] Front Right: Playback 25 [81%] [-9.00dB] [on] Simple mixer control 'Front Mic',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 25 [81%] [3.00dB] [on] Front Right: Playback 25 [81%] [3.00dB] [on] Simple mixer control 'Surround',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 25 [81%] [-9.00dB] [on] Front Right: Playback 25 [81%] [-9.00dB] [on] Simple mixer control 'Center',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 31 Mono: Playback 25 [81%] [-9.00dB] [on] Simple mixer control 'LFE',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback 0 - 31 Mono: Playback 25 [81%] [-9.00dB] [on] Simple mixer control 'Line',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 25 [81%] [3.00dB] [on] Front Right: Playback 25 [81%] [3.00dB] [on] Simple mixer control 'CD',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 25 [81%] [3.00dB] [on] Front Right: Playback 25 [81%] [3.00dB] [on] Simple mixer control 'Mic',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 0 [0%] [-34.50dB] [off] Front Right: Playback 0 [0%] [-34.50dB] [off] Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'Capture',0 Capabilities: cvolume cswitch Capture channels: Front Left - Front Right Limits: Capture 0 - 31 Front Left: Capture 0 [0%] [-12.00dB] [on] Front Right: Capture 0 [0%] [-12.00dB] [on] Simple mixer control 'Capture',1 Capabilities: cvolume cswitch Capture channels: Front Left - Front Right Limits: Capture 0 - 31 Front Left: Capture 0 [0%] [-12.00dB] [on] Front Right: Capture 0 [0%] [-12.00dB] [on] Simple mixer control 'Input Source',0 Capabilities: enum Items: 'Mic' 'Front Mic' 'Line' 'CD' Item0: 'Line' Simple mixer control 'Input Source',1 Capabilities: enum Items: 'Mic' 'Front Mic' 'Line' 'CD' Item0: 'Line' /etc/modprobe.conf alias sound-slot-0 snd-hda-intel options snd-hda-intel model=6stack-dig install scsi_hostadapter /sbin/modprobe sata_nv; /bin/true remove snd-intel8x0 /sbin/modprobe -r snd-pcm-oss; /sbin/modprobe --first-time -r --ignore-remove snd-intel8x0 install snd-intel8x0 /sbin/modprobe --first-time --ignore-install snd-intel8x0 && { /sbin/modprobe snd-pcm-oss; /bin/true; } install usb-interface /sbin/modprobe ohci-hcd; /sbin/modprobe ehci-hcd; /bin/true alias ieee1394-controller ohci1394 alias eth0 forcedeth alias ath0 ath_pci alias eth1 forcedeth alias eth2 eth1394 remove snd-hda-intel /sbin/modprobe -r snd-pcm-oss; /sbin/modprobe --first-time -r --ignore-remove snd-hda-intel install snd-hda-intel /sbin/modprobe --first-time --ignore-install snd-hda-intel && { /sbin/modprobe snd-pcm-oss; /bin/true; } Motherboard: MSI K9N platinum http://www.newegg.com/Product/ShowImage.asp?Image=13%2D130%2D049%2D02%2Ejpg%2C13%2D130%2D049%2D03%2Ejpg%2C13%2D130%2D049%2D04%2Ejpg%2C13%2D130%2D049%2D05%2Ejpg%2C13%2D130%2D049%2D06%2Ejpg&CurImage=13%2D130%2D049%2D03%2Ejpg&Description=MSI+K9N+Platinum+Socket+AM2+NVIDIA+nForce+570+Ultra+MCP+ATX+AMD+Motherboard+%2D+Retail ------------------------------------------------------------------------- Using Tomcat but need to do more? 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