On Sat, 20 May 2017 00:39:05 +0200, Rudolf Schmidt wrote:

Hi guys,

I want to report a bug or some kind of problem with alsa

$ alsamixer ALSA lib simple_none.c:1550:(simple_add1) helem (MIXER,'Master Playback Switch',0,1,0) appears twice or more cannot load mixer controls: Invalid argument

I tried to figure out what is going on, tried a lot of things, removing packages, installing packages, removing pulseaudio etc.

Nothing helped. I found a gentoo user who reported to had the same issue, upgrading to kernel 4.12 helped, in particular that patch: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?h=to...

So I also upgraded to kernel 4.12 but in my case I have still the same problem.

Here is my config: http://www.alsa-project.org/db/?f=9d35ec5d71ac60e210daf91b6c311f72fc8a98a0

The mobo looks like having dual codecs like a similar one from Gigabyte. Try to apply the patch below on top of 4.12-rc kernel.

Note that you'll have no Master volume with this configuration, and there are multiple PCM devices for different outputs (hw:0,0 and hw:0,4 or such). It should be switched via UCM profile by PulseAudio.

Takashi

--- diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -2328,6 +2328,7 @@ static const struct snd_pci_quirk alc882_fixup_tbl[] = { SND_PCI_QUIRK_VENDOR(0x1462, "MSI", ALC882_FIXUP_GPIO3), SND_PCI_QUIRK(0x1458, 0xa002, "Gigabyte EP45-DS3/Z87X-UD3H", ALC889_FIXUP_FRONT_HP_NO_PRESENCE), SND_PCI_QUIRK(0x1458, 0xa0b8, "Gigabyte AZ370-Gaming", ALC1220_FIXUP_GB_DUAL_CODECS), + SND_PCI_QUIRK(0x1462, 0xda57, "MSI Z270-Gaming", ALC1220_FIXUP_GB_DUAL_CODECS), SND_PCI_QUIRK(0x147b, 0x107a, "Abit AW9D-MAX", ALC882_FIXUP_ABIT_AW9D_MAX), SND_PCI_QUIRK_VENDOR(0x1558, "Clevo laptop", ALC882_FIXUP_EAPD), SND_PCI_QUIRK(0x161f, 0x2054, "Medion laptop", ALC883_FIXUP_EAPD),