Audio Recording Fails - Slackware 11.0 & ALSA
 

Hi there!
I'm having some problmes getting audio recording on my slackware 11.0 box working(it worked using 10.2 but now I can't figure whats wrong).

On my box I have two soundcards;
Creative SB! Audigy LS and an on-board AMD card. I only use the Creative card.

From lspci:
00:07.5 Multimedia audio controller: Advanced Micro Devices
[AMD] AMD-768 [Opus] Audio (rev 03)
02:05.0 Multimedia audio controller: Creative Labs SB Audigy LS

I have my mic plugged in the mic input on the creative card, but i can't record anything with either krec and ecasound.
This is my amixer output:

Hmm, I really don't know what to do...

Thanks in advance:)

You may need to either disable onboard audio, or try switching the order of the cards with "index=" in your modprobe.conf (or modules.conf).

More information on this is in the ALSA-Configuration.txt file in either the kernel docs, or the alsa-driver.

Hi! Thanks for reply!
I have tried to disable the onboard sound card in BIOS, but it still comes up i both alsaconf and lspci(I really don't dislike good hardware support, but detecting a disabled card... The best harware support you get or what!:P)

If anyone have the time to take a look at my amixer output I would appriciate it!:)
Maybe there is some bad setting there?

Cheers,
Jorek

I am assuming you are using the 2.6.17.13 kernel. It is compiled with a version of ALSA that contains a known bug in recording. I was hoping someone had released a recompiled kernel with the patched version of ALSA, but it doesn't look like it.

Did anyone fix this yet?
 

Hi! I have the exact same problem - Slack 11 + Alsa = output but no input. I can't record with audacity, arecord, skype, nothing. With acrecord, it either records a .wav file that turns out to be empty, or else gives me this error:

arecord: pcm_read:1345: read error: Input/output error

Audacity records garbage or nothing.

The last post mentioned something about a bug in 2.6? If anyone has a solution on how to record under Slack 11 with ALSA, I'd love to hear it. I can also post output from lspci, amixer, whatever, if anyone thinks that'd be helpful. Again, I can play files just fine, on Skype, the British lady talks to me in the test call. I just can't talk back.

Thanks!
Bill

The solution requires recompiling the 2.6 kernel using the patched version of ALSA. I haven't done this yet because I don't record often enough for this to be more than an inconvenience. I figure the next release of Slackware will have it taken care of, and I can wait till then.

Thanks! Post URL for more info?
 

Thanks very much. Would you mind posting the URL where you found out about this? I haven't recompiled the kernel before, to say nothing of adding in a patch, so if there's a site where you found this fix I'd be most grateful.

Bill

Instead of patching the kernel and rebuilding, just download the latest alsa-driver from alsa-project.org. It has a self-contained build environment and is usually more up-to-date than the kernel.