snd_hda_intel @ Intel DP35DP mb.: Input from Line-in / Mic can't be listen in the output

Loopback support for Intel HDA was added in ALSA version 1.0.15. More information here:
http://orion.lcg.ufrj.br/~roma/ALSA.html
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3399

You can try backporting ALSA from Hardy, or manually install the new version like this:
https://help.ubuntu.com/community/HdaIntelSoundHowto

For Gutsy just enable the backports repository (using synaptics), then install linux-backports-modules which contains ALSA 1.0.15.

Should I mark this as fixed, since Hardy already contains the updated ALSA version which fixes this problem?

current alsa version on Hardy doesn't have this anymore

i'm having this same problem. same motherboard, audio chip, etc. line-in isn't working for me either. is there a fix or workaround available? this is using alsa 1.0.16

Rayterril, could you give some more detail? If you're using Hardy and have the same motherboard as me, this is kind of weird.

On this motherboard, to enable the audio loopback, I go to gnome-volume-control, select edit/preferences and mark all the avaliable devices (just to be sure to not miss anything). With all those devices enabled (sometimes I need to close and reopen the gnome-volume-control for they appear).

Once this is done, I go to the "Options" tab. There should be there 3 "Input source" selectors. The first one is what matters (I'm not able to make the others work), and I select "Line" on there.

After this, I go to the "recording" tab and make sure the volume are adjusted (not muted). I recommend setting a low volume because, for loopback, the audio is too much amplified.

Finally, on the "Switches" tab, I enable the "Analog Loopback" checkbox and then I can listen the line-in audio on the system speakers, so loopback is working, as opposed to this bug I reported - that's why I've closed it (I read somewhere that the person which reported the bug is enough to close it, but feel free to reopen if you have reasons to think it should be).

I'm not sure, looking at your comments, if line-in don't work at all for you or if it don't work only for audio loopback; if it don't work at all, maybe you should check your hardware or open a new bug report.

Roberto-

I followed your instructions, and I still cannot hear the audio. Is there anything else we can do to troubleshoot the issue on Ubuntu?

I'll try to test w/ another distro using a live cd to try and rule out hardware mobo issues.

Thanks,
-Ray

Rayterril,

     If you have tryed every possibility with gnome-volume-control, I
unfortunately don't know what to suggest anymore.. anyway, I'd point the
following questions:

     - is it a clean Ubuntu Hardy install? Did you try making the same
(playing with the gnome-volume-controls) through the LiveCD?
     - are you sure your TV card (or whatever you're putting in your line in
input) is outputing the sound correctly?

     I don't think it's a driver problem since I have exactly the same
motherboard (Intel's DP35DP) and alsa 1.0.16 fixed it for me. Good luck!
Feel free to reopen the bug (or open some other) if you have reasons to
think it's a Ubuntu problem.

On Thu, Jul 10, 2008 at 10:26 PM, rayterrill <email address hidden>
wrote:

> Roberto-
>
> I followed your instructions, and I still cannot hear the audio. Is
> there anything else we can do to troubleshoot the issue on Ubuntu?
>
> I'll try to test w/ another distro using a live cd to try and rule out
> hardware mobo issues.
>
> Thanks,
> -Ray
>
> --
> snd_hda_intel @ Intel DP35DP mb.: Input from Line-in / Mic can't be listen
> in the output
> https://bugs.launchpad.net/bugs/151634
> You received this bug notification because you are a direct subscriber
> of the bug.
>

Good Day - i've been searching for a few hours and found this post; I am having exactly the same problem; I am not sure if I should repeat my information from my post on ubuntu forum or if I can just paste a hyperlink to it;

Please see Entry #6 here >>
http://ubuntuforums.org/showthread.php?t=790600

I've loaded the latest version of Alsa
I have a fresh install of Ubunty Hardy (8.04) 2.6.24-19-generic
I've dabbled with alsa-mixer enabling everything that seems relevant.
I know my sound-card is producing sound; i tested the output.
I don't get any loopback on line-in
I got loopback on mic once, but never again - maybe i didnt test i properly
Nor can I record or use Skype.

Any assistance would greatly be appreciated! Thank you,

deault install of maverick meerkat has the same problem. :P