A minimal self-contained demo program ('test-format') has been
developed
and is attached, that demonstrates the issue 100% on the reporters machine (HDA-Intel, 6-ch I believe). The output is:
root@Xeon:/home/patest# ./test-format Testing device front Num channels 6 Testing rate: 22050 Result:...Invalid Sample Rate Testing rate: 32000 Result:...Invalid Sample Rate test-format: pcm_params.c:2249: snd1_pcm_hw_params_slave: Assertion
`err
= 0' failed.
Testing rate: 44100 Aborted
Alsa-info is at:
http://www.alsa-project.org/db/?f=19dfeee29f73007e61a00a8fabe3c958f7cb8e8
7
This apparently happens with or without Pulseaudio running, with
just the
single 44100 rate, and also with surround devices. Also, on all
current
Debian and Ubuntu - we have focused on Jessie.
I do not have a machine with similar hardware, so cannot duplicate
the
results.
Any comments, ideas etc would be appreciated.
I also can't reproduce this. So this must be pretty specific to the setup.
Could you give the exact condition to trigger the problem? Also, this happens certainly with the latest alsa-lib?
Thanks for taking a look. Just compiling and running that test
program, on
the reporter's machine, which has some sort of multi-channel HDA-Intel,
is
100% reproducible. The Alsa-lib must be the one provided by Debian
Jessie
(which was released 25.4.2015); 1.0.28 I think. Does the Alsa-info give enough details - I can ask any specific questions.
However, Raymond seems to have some ideas of a possible cause, in
connection
with arbitrary period size and softvol; is that plausible?
Possibly, but I wonder why I couldn't see it when I tried with different module options.
In anyway, the fix would be simple, the patch like below. Could you check whether it actually fixes your issue?
http://music.columbia.edu/pipermail/portaudio/2015-May/016773.html
i7 test # ./test-format Testing device front Num channels 6 Testing rate: 22050 Result:...Invalid Sample Rate Testing rate: 32000 Result:...Invalid Sample Rate Testing rate: 44100 Result:...Unexpected Result??? Testing rate: 48000 Result:...Unexpected Result??? Testing rate: 96000 Result:...Unexpected Result??? i7 test # uname -r 3.13.0-sabayon
Your program should show snd_strerror(err) instead of Unexpected Result ???
It is strange that it fail at 48000Hz and 96000Hz
What is snd_hda_prealloc_size used by 3.13.0-sabayon ?
You need to define RULES_DEBUG in pcm_params.c to provide debug output