At Mon, 20 Oct 2014 19:31:59 +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
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...
Takashi