LinuxQuestions.org
Share your knowledge at the LQ Wiki.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware
User Name
Password
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

Notices

Reply
 
Search this Thread
Old 01-16-2013, 10:29 PM   #1
Poprocks
Member
 
Registered: Sep 2003
Location: Toronto, Canada
Distribution: Slackware
Posts: 199

Rep: Reputation: 30
C-Media PCI soundcard - audio skipping


My onboard soundcard is busted (audio only works out of one channel), so I went and bought a $10 PCI soundcard. The relevant lspci entry is:

Code:
05:00.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
At first alsa was trying to keep using my onboard Intel card, but with some modprobe.conf magic it was easy to switch the default to my C-Media card.

Audio works out of both channels just fine, but it keeps skipping (or hiccupping or stuttering, whatever you want to call it). This is reproducible at least for Flash (ie, Youtube) and Audacious.

I tried running Audacious in a terminal. Every time the audio skips, the following error appears:

Code:
ALSA lib pcm.c:7339:(snd_pcm_recover) underrun occurred
I thought maybe alsa was getting confused that there were two soundcards, so I tried unloading the modules for my onboard card. Same problem. I then tried disabling the onboard card in the BIOS entirely. Same problem.

I'm wondering if anyone can offer any tips on this. It's been driving me nuts and I've googled and googled and it seems that no one else in the world is having this issue.

I guess I could go out and buy yet another soundcard and take this one back, but by all accounts this seems to be a common chipset so I can't understand why I'm having this issue.

Slackware 14.0, 32-bit SMP kernel. No customizations.
 
Old 01-17-2013, 09:56 AM   #2
business_kid
Guru
 
Registered: Jan 2006
Location: Ireland
Distribution: Slackware & Android
Posts: 6,564

Rep: Reputation: 579Reputation: 579Reputation: 579Reputation: 579Reputation: 579Reputation: 579
CMI 8738? It's been a long time since I had one of those.

It's the driver. A good idea if you can still do it is to use the OSS driver because IIRC that card was old/junky enough to make it to Ireland 10 years ago, and alsa was those heads who said "Sound isn't good enough; we're going to rewrite from scratch and rewrite all the drivers as well, except we're going to do it better:-/." I think cmipci was the module name. Therer's a doc in the kernel about it. Read up.
 
Old 01-20-2013, 06:52 PM   #3
Poprocks
Member
 
Registered: Sep 2003
Location: Toronto, Canada
Distribution: Slackware
Posts: 199

Original Poster
Rep: Reputation: 30
Thanks. I knew it had to be an old chipset because it has a bloody gameport. I mean, really, who needs one of *those* these days?

The documentation didn't reveal anything earth-shattering. I think I'll just buy a slightly less shitty card. I really don't want to recompile my kernel to include OSS support just to get a $10 soundcard to work, and then have it only be able to play one sound at once (this card has no hardware mixing capabilities).
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
No soundcard detected on my onboard Riptide PCI Audio Controller chip claudeyu Linux - Hardware 1 06-11-2006 03:07 PM
Low sound off a ESS Maestro 3 PCI Audio soundcard ttdarkie Linux - Newbie 4 08-07-2005 10:37 AM
Soundcard problems.. [C-Media PCI CMI8738-SWIEC] UltimatePower Linux - Hardware 1 05-31-2005 04:39 AM
Getting CD audio through PCI soundcard NOT motherboard soundcard HalfDiminished Debian 0 01-11-2005 07:59 AM
C-Media CM8738 6-channel PCI soundcard, setting the number of speakers under FC3 Chutney Linux - Hardware 2 12-28-2004 11:19 AM


All times are GMT -5. The time now is 11:35 AM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration