On 06/01/2012 04:54 AM, Raymond Yau wrote:
2012/5/30 David Henningsson<[email protected]>:
On 05/30/2012 03:04 PM, Raymond Yau wrote:
I am afraid this does not work with desktop computer which has front
mic , internal mic, Line in ,CD (or stereo mix with those via hda
codecs)
With ubuntu 12.04 and unity , if I enable hda jack detect with my
ad198x on my desktop, sound preference does not allow me to select
front mic since I am still using ac97 front panel (with no jack detect
circuit)
In that case your BIOS should detect that you're using an ac'97 front panel
and set the "no prescence detect" bit in the default pin config.
The codec driver should then not create any jack at all, and PulseAudio
would pick up 'Input Source' -> 'Front Mic' as a reason to have create a
'Front Mic' port.
The patched driver just create two jack detect controls for rear panel
jacks when BIOS set front audio panel type to AC97
There are difference for the system settings/sound in unity and gnome
In gnome session, the system settings/sound list the three hardcoded
ports (front mic, line and rear mic) instead of all the items in the
"Input source" / "Capture Source" controls ( There is no CD in HDA,
and no CD , stereo mix, aux, phone for my other sound cards with ac97
codec)
Is there any way to add back "Stereo Mix" to pulseaudio 's port ?
Yes. See:
http://www.freedesktop.org/wiki/Software/PulseAudio/Backends/ALSA/Profiles
However if you have additional questions about how to write PulseAudio
profiles and paths I might not have the time to help you out with that,
hopefully you will be able to sort that out by yourself.
In unity session, the system settings/sound only list the plugged jacks.
I think the usage of jack detect to select input source automatically
is broken for for those motherboards which have three audio jacks in
rear panel and retask those pink and blue jacks for surround51 output.
The module-switch-on-available-port should check whether "Channel
mode' is 6 and exclude the result those jack detect of "rear mic" and
"line in" since they have been retasked for output
Hmm. That would lead to quite hairy code in PulseAudio, I'm afraid...and
I don't think it's the right way to solve the problem either.
I think we could go about this in different ways.
1) The easiest way is to say that if you're changing "Channel mode"
manually in alsamixer, you're on your own. After all, the normal/newbie
end user would not know about alsamixer at all, so if you're capable of
changing things in alsamixer you're assumed to be capable of configuring
PulseAudio's profiles (using the link above) to match that as well.
2) We could make a policy decision to remove the code that retasks the
jacks, and direct people to hda-jack-retask if they want to do that.
That would mean simpler code for everyone - however, with the recent
addition of multi-IO in the Realtek driver (for example), things doesn't
seem to head that way...
3) We could add both "Line Out Surround Jack" and "Rear Mic Jack". The
"Rear Mic Jack" would always return present=no when you're in 6-channel
surround retask mode, and "Line Out Surround Jack" would always return
present=no when you're in the normal mode.
BTW, the ICH8 HDA controller support multi stream capturing and ad1988
has thee capture subdevices
arecord -l
card 1: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 3/3
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
You would be able to make a multi-source profile in PulseAudio that can
record from all of these simultaneously, but we're missing a patch that
can control volumes and switches with indices, so you would have to
control the gain manually in alsamixer.
what is the definition of "Mono Output" in pulseaudio ?
it is just the capability of the sound card to play mono or have a
mono speaker with a specific volume control
My three other sound cards does support mono playback and mono capture
The system setting/sound in gnome session allow me to select "mono
duplex" but when it does not allow me to select "mono output + mono
input" in unity session.
That sounds like the known bug I was working on yesterday.
--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
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