> >> > > > >> > > >> > > >> > > >> > 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 > > > > > > Raymond, there can certainly be cases which this patch does
not
> > cover
> after all, it's mostly a band aid given the lack of topology
information -
> but do you see cases where this patch actually causes a > *regression*? If > so, could you point me to alsa-info for the machine where this
patch
causes
> a regression? > > > >
www.realtek.com.tw/products/productsView.aspx?Langid=1&PNid=24&PFid=27&Level=5&Conn=4
> > I expect those desktop with 2+2 HD Audio codec support
independent
headphone
> > This mean the driver should not create "Lineout+HP" Playback
volume
> > Line out and headphone cannot share same DAC
Do you have a pincfg representing this? Then we can check it
easily
via hda-emu.
http://git.kernel.org/cgit/linux/kernel/git/tiwai/hda-emu.git/tree/codecs/ca...
Both HP (0x21) and LO (0x14) can share the same DAC (0x03) over mixer (0x0d). So the statement above "Line out and headphone cannot share same DAC" isn't correct.
Refer to user manual
Multi-streaming can be enabled in the Realtek control panel to
allow
independent audio streams to be sent to/from the front and rear
jacks
This is the implementation detail and it's a matter of taste which should be dependent and which not. There is no bible here.
You can forcibly do that by a fixed DAC assignment (or add some badness) if you want, too...
http://mailman.alsa-project.org/pipermail/alsa-devel/2014-February/072775.ht...
Seem headphone not working properly on hp prodesk 600 g1
As I mentioned on Bugzilla, that problem ended up being due to some kind of motherboard defect in the particular machine. On the replacement 800 G1 machine, the headphone jack works fine. I can't really say whether or not dual independent audio streams work, though.
If your prodesk 800 g1 are still using alc221, you can disable the
speaker node 0x17 by hda-jack-retask and add hint indep_hp=1 to hda-jack-retask.fw
[Hint] indep_hp=1
or
in hda/hda_generic.c
Force the driver to add badness when assign dac to speaker first by
if (spec-indep_hp && !indep_hp_possible(codec)) badness += BAD_NO_INDEP_HP;
- if (cfg->hp_outs > 0 && cfg->line_outs > 0)
if (get_defcfg_location(snd_hda_codec_get_pincfg(codec,
cfg->line_out_pins[0])) == AC_JACK_LOC_REAR)
if (fill_hardwired)badness += BAD_NO_INDEP_HP;Driver create volume control for line out instead of speaker first
Driver create "Speaker+LO" instead of "Headphone+LO" when you apply
david's patch
and add the following to patch_alc269 in patch_realtek.c
spec->gen.indep_hp=1;
The driver will create
device 2 alt analog
and independent hp switch
You can play another audio stream to device 2 while playing stereo stream
to line out through device 0 at the same time when independent hp switch is "ON"
Assume alc221 is at card 1
speaker-test -c2 -D hw:1,0 -t wav
aplay -v -D hw:1,2 stereo.wav
To ensure independent hp control not add to those notebooks with dock line out
codecs/canonical/alc3226-dell-precision-m2800-ccert-201404-14986
static bool indep_hp_possible(struct hda_codec *codec)
+ if (get_defcfg_location(snd_hda_codec_get_pincfg(codec, cfg->line_out_pins[0])) != AC_JACK_LOC_REAR) + return false;