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[Pita]

I got myself a new seond hand mother board and have now no more sound.
First one MoBo was installed and there was no sound. So we changed to another MoBo and again there is no sound.

Giving command "aplay ./sound/alert.wav" output is:
Playing WAVE './sound/alert.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono,
yet nothing can be heard.

I tested my speakers they are working properly. At computer shop where
Mobo is installed there is no sound well.

I booted in to Knoppix live there again is no sound.

Here are some specs:

Code: [Select]

/sbin/lspci           
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 661FX/M661FX/M661MX Host (rev 11)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS AGP Port (virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS964 [MuTIOL Media IO] (rev 36)
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 01)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] AC'97 Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:05.0 IDE interface: Silicon Integrated Systems [SiS] RAID bus controller 180 SATA/PATA  [SiS] (rev 01)
00:0d.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev 80)
00:0e.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200] (rev a1)


Code: [Select]

/sbin/lsmod|grep snd
snd_seq_dummy           1035  0
snd_seq_oss            21907  0
snd_seq_midi_event      3924  1 snd_seq_oss
snd_seq                36499  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss            28741  0
snd_mixer_oss          10545  1 snd_pcm_oss
snd_usb_audio          63588  0
snd_hwdep               4128  1 snd_usb_audio
snd_usbmidi_lib        13362  1 snd_usb_audio
snd_rawmidi            13181  1 snd_usbmidi_lib
snd_seq_device          3853  4 snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd_intel8x0           20342  1
snd_ac97_codec         80849  1 snd_intel8x0
ac97_bus                 774  1 snd_ac97_codec
snd_pcm                48666  4 snd_pcm_oss,snd_usb_audio,snd_intel8x0,snd_ac97_codec
snd_timer              12858  2 snd_seq,snd_pcm
snd                    36298  15 snd_seq_oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_usb_audio,snd_hwdep,snd_usbmidi_lib,snd_rawmidi,snd_seq_device,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer
soundcore               3736  1 snd
snd_page_alloc          5143  2 snd_intel8x0,snd_pcm


Code: [Select]

cat /proc/asound/modules
 0 snd_intel8x0

On both MoBos the sound card was detected. We even put an external
sound card which was as well detected, yet no sound and no errors.

What could be the mystery?

[fogpipe]

I realize this is probably elementary, but just in the interest of thoroughness, have you run alsamixer from a prompt to make sure the volume and pcm channels are not muted and set to a good volume?

[MarkGrieveson]

Is it an on-board sound-card, or are you looking to get sound from another card (IE, a pci device)?  Perhaps before booting into Linux, you can check the bios and see if the on-board sound-card is enabled.  To get my sound-card to work, I had to disable the on-board sound-card via the bios.

[Pita]

Of cause checking alsamixer was the first thing to do.

It is an on-board sound card and enabled in the BIOS.
When an external sound card was installed I would not know if on BIOS sound was disabled.

As more as I think about the problem the more I have the suspicion that the sound it not powered and
the technician did some wrong connections on the MoBo since sound command shows it is working
and all is detected.

Will bring the machine tomorrow to another shop and see if they can fix it..

[rbistolfi]

I think you may need to reconfigure the sound by running alsaconf as root.

HTH, Rodrigo