[alsa-devel] NVidia AC97 / CK804: arecord hangs in system call poll()
rmenzner at L1id.com
Fri Jun 29 13:36:15 CEST 2007
my soundcard is an onboard AC97 CK804 NVidia. I use snd-intel8x0 module.
Everything works fine except recording sound. When calling
arecord -f cd buffer.wav
the program infinitely hangs, and an strace shows that it is a poll()
call that does not return. After interrupting, a wave file of 44 bytes
which is the header only is left. My setup is Kernel 18.104.22.168, all
ALSA-software is updated to the latest version, that is 1.0.14(a).
In a previous setup with an older ALSA version and kernel 22.214.171.124
recording did work with the same hardware. Now that I updated all ALSA
software, even with that older kernel version the same recording problem
came up. From that I concluded that it is somehow related to the
ALSA-lib version. I have tried to downgrade ALSA-lib down to 1.0.0 to no
I have also made tests appropriate if this would be an interrupt problem
(using pci=noroute et al) which also did not solve the problem.
I have scrolled though the archives of alsa-user and there have been a
few posts regarding the same problem (but with other chip sets).
However, in those threads no definitive solution of the problem has been
discussed. So I tried it again in alsa-user but did not get any feedback ...
Now, I finally try this developer list. Your comments and help are much
appreciated. Let me know if you need further info. I'm not a Linux
system programmer or specialist, but I would be willing to do some
debugging if somebody explains what to check.
Thanks for any support,
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