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may I ask for help with my sound issue? After newest kernel update i have lost my soundcard. There is only sound via usb adapter. My headphones or speakers working only through this device. The sound setting widget dosnt show any soundcard device beside usb. I have updated alsa driver from launchpad and also I have remove ./pulse directory, I have try gnome-alsamixer ...but my sound card is just gone. I try to find out if that is some hardware issue or if that is this unlucky kernel update. Pls. take a look on this output of: 

wget -O alsa-info.sh http://www.alsa-project.org/alsa-info.sh && chmod +x ./alsa-info.sh && ./alsa-info.sh

http://www.alsa-project.org/db/?f=80c541c891c4bce51447c9d2f75ea7f9d8b678a4

here is the alsa-base.conf (with included blacklist):
http://www.pasteall.org/32574

and output of: 

grep "Codec:" /proc/asound/card*/codec*
grep: /proc/asound/card*/codec*: No such file or directory

what else can i give you to find out whats wrong?

Thank you very much for any help and have a nice day.

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please attach the output of lspci in your question. – Samik Jun 4 '12 at 17:34
oh sure, I forgot that: pasteall.org/32588 – user43484 Jun 4 '12 at 18:27
to complete this report: i had only on-board soundcard/chip..... – user43484 Jun 4 '12 at 18:41
There is no audio device detected in the lspci output, so the sound hardware is not detected, have you got any indication in any other ways that the sound chip may be malfunctioning? – Samik Jun 4 '12 at 18:48
To be sure, what is the output of lsmod | grep snd? – Samik Jun 4 '12 at 18:51
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2 Answers

up vote 0 down vote

Based on the information you have provided so far, it appears like the driver module for your internal sound-card has been blacklisted.
You said that Ubuntu can detect and work with the sound card if you boot from Live CD. So spend the effort to boot from the Live CD again and do a lsmod | grep snd there, in this way you'll be able to know what extra modules are loaded there for your internal sound-card.

Then come back to your Ubuntu installation.

Check the file /etc/modprobe.d/blacklist-oss.conf and search there for those missing modules and if found comment them out by placing a # before them.
Finally perform sudo modprobe <missing modules> to load them into kernel.

share|improve this answer
excuseme, I dont get clear in comparison between this: pasteall.org/32626 (lsmod | grep snd ) and this: pasteall.org/32631 (etc/modprobe.d/blacklist-oss.conf). There is also soundcard in blacklist...that confusing me...could you help me to chceck it out? Thank you very much! – user43484 Jun 5 '12 at 16:54
May I know the make/model of your sound card? – Samik Jun 5 '12 at 17:08
i have on board chip called: CM6501 – user43484 Jun 5 '12 at 17:33
Oh, that one is a USB sound card and I should have informed you to search it with lsusb, not lspci. Also this explains your provided data. From the very first o/p of alsa-info.sh, it's sure that your USB sound card is there and detected, with drivers. Just try alsamixer instead of gnome-alsamixer, if it detects your sound card, you can select your sound card with F6. – Samik Jun 5 '12 at 18:23
okay, that must be the problem, now i found my card...you are right, this is usb sound...and i could switch it on with alsamixer. but still I have no sound. So it is broken hardware. :(( Thank you very much for the help. I have learned a lot with your help. This is the best support portal in Www – user43484 Jun 6 '12 at 14:46
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up vote 0 down vote

Can you try this, that i used to solve a similar issue:

sudo modprobe snd-hda-intel

and add a line with snd-hda-intel at the end of /etc/modules.

I think this can solve your issue.

share|improve this answer
no, this solution dosn't work for me...so sorry :( – user43484 Jun 5 '12 at 16:59

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