[ALSA - driver 0001988]: No microphone input on Dell Inspiron 6400

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A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1988> 
======================================================================
Reported By:                tbecker37
Assigned To:                tiwai
======================================================================
Project:                    ALSA - driver
Issue ID:                   1988
Category:                   PCI - hda-intel
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Distribution:               Fedora Core 5
Kernel Version:             2.6.16-1.2080_FC5smp
======================================================================
Date Submitted:             03-31-2006 21:28 CEST
Last Modified:              06-18-2006 00:03 CEST
======================================================================
Summary:                    No microphone input on Dell Inspiron 6400
Description: 
Installing the 1.0.11rc4 driver enabled sound output both for extenal and
headphone jack. However microphone input does not work.  Mic input is
displayed in alsamixer but is not adjustable.

I have also compiled and tried the driver from CVS on 3-31 with no
success.
======================================================================

----------------------------------------------------------------------
 tbecker37 - 04-17-06 19:28 
----------------------------------------------------------------------
Just tried alsa-driver-1.0.11rc5 w/ no effect in this issue.  Mic control
is present is alsamixer but isn't ajustable and mic still doesn't work. 
Is there anything else I can provie from my system to help resolve this
issue?

After trying alsa-driver-1.0.11rc5 a little harder (like unmuting the
capture) mic inputs work.  Setting the capture levels to ~75% prevents
scratchy recordings.

Thanks guys!



----------------------------------------------------------------------
 maiquel - 06-18-06 00:03 
----------------------------------------------------------------------
I can reproduce this on a Dell Latitude 120L laptop (Sigmatel 9200 chip),
with Mandriva Linux 2006, kernels: 2.6.12-18mdk (rpm from 'cooker'
repository), 2.6.12.18 (compiled by me) and 2.6.12-18mdk (rpm from de
official DVD).

I have compiled the alsa 1.0.11 against the kernel 2.6.12.18. 

The command:
cat /proc/asound/version

Returned:
Advanced Linux Sound Architecture Driver Version 1.0.11.
Compiled on May 30 2006 for kernel 2.6.16.18.

One interesting thing is that with 1.0.11 there is some noise when I
unmute line-in (external microphone, in this model there isn't a internal
one) and try to record something. The amplitude response is ok and actualy
I'm able to hear my voice (when a speak loud) but there is a lot of noise.


I think this issue is replicated by 0002038.

Issue History
Date Modified  Username       Field                    Change              
======================================================================
03-31-06 21:28 tbecker37      New Issue                                    
03-31-06 21:28 tbecker37      Distribution              => Fedora Core 5   
03-31-06 21:28 tbecker37      Kernel Version            => 2.6.16-1.2080_FC5smp
03-31-06 23:39 tbecker37      Issue Monitored: tbecker37                    
04-03-06 08:03 anarki         Note Added: 0009087                          
04-03-06 19:31 rlrevell       Note Added: 0009104                          
04-03-06 19:43 anarki         Note Added: 0009105                          
04-12-06 16:00 tbecker37      Note Added: 0009244                          
04-17-06 19:28 tbecker37      Note Edited: 0009244                         
04-17-06 19:30 tbecker37      Issue End Monitor: tbecker37                    
06-18-06 00:03 maiquel        Note Added: 0010291                          
======================================================================




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