At Sun, 19 Oct 2014 07:02:07 +0800, Raymond Yau wrote:
In the scenario where there is one "Line Out", one "Speaker" and
one
"Headphone", and there are only two DACs, two outputs will share a
DAC.
Currently any mixer on such a DAC will get the "PCM" name, which is misleading. Instead use "Headphone+LO" or "Speaker+LO" to better specify what the volume actually controls.
Are there any examples ?
I used "hda-emu
codecs/canonical/alc3226-dell-precision-m2800-ccert-201404-14986 -i 1"
when
developing the patches.
I don't have any hardware available myself that exposes this behavior,
but I can maybe fake one with hdajackretask, if that counts...
How about adding these names to slaves of virtual master volume/switch ?
hdajackretask won't help if the topology of the codecs are different
Seem the badness still prevent the driver to support surround 5.1 with three rear panel jacks, internal speaker and front panel headphone for Thinkcenter A58 using alc662
https://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg29203.html
Why 3stack desktops with 6 channels codecs not using "Headphone+LO" or "Speaker+LO" ?
The problem is just the lack of DACs, so it cannot cover all three outputs, no matter how the pins are chosen. That is, it's no 6 channels at all but 4 channels at most.
http://shop.lenovo.com/us/en/desktops/thinkcentre/a-series/a58/
The technical specification of a58
2 pin internal speaker connector Alc662 5.1
https://bbs.archlinux.org/viewtopic.php?id=156433
Seem windows support surround 5.1
ALC662 has three DACs, so it's a different problem, if any. ALC269 and its variants have only two DACs.
Takashi