At 11:31 PM 4/24/2004 -0400, Karthik Vishwanath wrote:
Hello,

I seem unable to get any audio out of my debian installation. The
relevant lines from lsmod shows me:

emu10k1                60812   0
ac97_codec             13428   0  [emu10k1]
sound                  58440   0  [emu10k1]
soundcore               3972   7  [emu10k1 sound]

And, I am unable to hear audio when I try:
# cat chimes.wav > /dev/dsp

/dev/dsp does exist, though.

# uname -a
Linux gandalf 2.4.25-1-k7 #1 Tue Feb 24 14:24:28 EST 2004 i686 GNU/Linux

What must I try? Also, I am pretty sure that I have'nt detailed enough
info. here - what other things do I need to list out?


1. Check (and tell us, if need be) what "lspci" reports about the sound hardware. It's hard to troubleshoot sound with no hardware information.

2. Check "ls -l /dev/dsp". Make sure it points to the right place. It should look something like this:

crw-rw---- 1 root audio 14, 3 Mar 14 2002 /dev/dsp

3. Related to #1. please tell us what you know (independently of lspci) about the sound hardware you are using. Are you certain (if so, how) that the emu10k1 module is the right one?

4. Might this be an IRQ issue? Check /proc/interrupts before and after you try to play a sound file. Make sure the access count for the audio device has incremented. An example from one of my systems (different sound driver):

5: 134002133 XT-PIC es1371

5. Has this sound hardware ever worked previously ... for example, with an earlier Linux kernel or a different OS?

6. Related to 5 ... are you sure your sound cabling is right and your speakers (or headphones) work? A long shot, but I'm trying to cover all possibilities you did not address.

7. Basic questions: Debian Woody, Sid, or Sarge? Stock or custom kernel?

8. Throughout my response, I've interpreted "unable to hear audio" as meaning that the system fails silently ... that is, the "cat" process runs to its conclusion without objection, but no sound actually comes out. (BTW, this isn't a very good way to play sound files, but it should make noise nonetheless.) If this interpretation is wrong, please correct it with appropriate details.



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