[Alsa-user] PinkFaun C-Media CMI8888 problems only on Intel i7-i5-i3

[AudoLinux]

I have a PinkFaun I2S card. This one is using C-media CMI8888 and the
only output is I2S. What is strange is that this card is working fine
only on AMD processors (or Intel Atom) but not , for example, on Intel
i7-6700. In this last case there is a very high, noisy and distorted
sound at 192kHz. At lower sampling rates, for example 44.1, the sound is
better, but there are periodic noises.
I have disabled embedded audio in BIOS, have checked with hda-analyzer,
I have confronted the loaded modules with a working system (the modules
are the same), I have increased the buffer, I have checked with
standard, realtime and ck kernel, tried to disable c-media specific
driver and a lot of other things, without results. My system is
archlinux updated to the very last kernel and Alsa version.

What is more strange is that, if I boot from wtfplay minimal
distribution, the card is working!

I hope some people can give me some suggestions, because I have tried
everything!

--------------------

dmesg | grep hda
[ 3.327130] snd_hda_intel 0000:03:00.0: enabling device (0000 -> 0002)
[ 3.327199] snd_hda_intel 0000:03:00.0: Disabling MSI
[ 3.327200] snd_hda_intel 0000:03:00.0: Force to non-snoop mode
[ 3.367831] snd_hda_codec_cmedia hdaudioC1D1: autoconfig for CMI8888:
line_outs=4 (0x6/0x7/0x9/0x8/0x0) type:line
[ 3.367833] snd_hda_codec_cmedia hdaudioC1D1: speaker_outs=0
(0x0/0x0/0x0/0x0/0x0)
[ 3.367834] snd_hda_codec_cmedia hdaudioC1D1: hp_outs=0
(0x0/0x0/0x0/0x0/0x0)
[ 3.367834] snd_hda_codec_cmedia hdaudioC1D1: mono: mono_out=0x0
[ 3.367835] snd_hda_codec_cmedia hdaudioC1D1: inputs:

[Clemens Ladisch]

if I boot from wtfplay minimal distribution, the card is working!

Different kernel versions?


Regards,
Clemens

[AudoLinux]

Yes, most probably. I have contacted the developer and he reported that
"...I went quickly through my emails and discovered, that one user was
asking me about CM8888 based device. His problem was that he was getting
a noise when he was using 'aplay' utility. With 'wtfplay' he was able to
play audio correctly..."

However the tests with AMD v/s Intel have been made with the same linux
arch image on a number of computers, nothing different. I am finding it
difficult to find a reason!

Post by Clemens Ladisch

if I boot from wtfplay minimal distribution, the card is working!

Different kernel versions?
Regards,
Clemens
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