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I'm building a linux box for MythTV and had the sound working fine for a couple of weeks. I recently plugged in a digitial audio cable to the spdif connector and now I can't get sound to work at all. I've removed the digital cable and am just trying to use the regular output port. From reading other posts on this board I've done the following to troubleshoot:
- used apt to install the latest version of alsa-drivers and alsa-utils
- used alsaconf to reinstall the drivers for the onboard sound
- used alsamixer to unmute everything
- Have been using aplay to play a wav file to test sound
- Captured lsmod, lspci -v, and /etc/modules.conf (all three at the bottom of this post).
[mythtv@mythtv mythtv]# cat /etc/modules.conf
# default path
alias eth0 3c59x
alias char-major-81 bttv
alias usb-controller usb-ohci
alias usb-controller1 ehci-hcd
alias ieee1394-controller ohci1394
# alias sound-slot-0 i810_audio
# post-install sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -L >/dev/null 2>&1 || :
# pre-remove sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -S >/dev/null 2>&1 || :
alias scsi_hostadapter sata_sil
# nvidia kernel module
alias char-major-195 nvidia
# --- BEGIN: Generated by ALSACONF, do not edit. ---
# --- ALSACONF verion 1.0.4 ---
alias char-major-116 snd
alias char-major-14 soundcore
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias snd-card-0 snd-intel8x0
alias sound-slot-0 snd-intel8x0
# --- END: Generated by ALSACONF, do not edit. ---
Hmm. Your problem sounds very close to mine. I had sound working on my capture card for about 2 or 3 weeks. I decided to install a new HD and DVD drive. after connecting new hardware the sound from the capture card doenst work.
Then I removed the new hardware thinking there was some kind of conflict. This didnt help. So I took the card and put it in my wife's windoze box and the sound works.
The sound Im speaking of is sound from the capture card itself not the sound from the sound card. I can play an .ogg file through the sound card fine. I have triple checked everything I can think of. The sound levels are fine in alsamixer and they dont reallly matter right now since I have the speakers plugged directly into the capture card.
running v4lctl i can see that the mute option is off.
I cant find any errors in the log files and all modules are being loaded. I also cant remember changing anything but adding the new hardware.
Heres a little hardware and software list:
Athlon 1.3 Ghz
Sis based motherboard
pv951 capture card using bttv drivers
es1371 sound card
If there is any information that you would like just let me know. I AM STUMPED!!!