LinuxQuestions.org
Go Job Hunting at the LQ Job Marketplace
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware
User Name
Password
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

Notices

Reply
 
Search this Thread
Old 11-05-2004, 10:11 AM   #1
mward
LQ Newbie
 
Registered: Nov 2004
Distribution: Mandrake
Posts: 4

Rep: Reputation: 0
no microphone input on Compaq Presario (AC97 chipset)


I'm using Mandrake 9.2 on a Compaq Presarion laptop.

Sound output is working fine (via mpg123) and aumix can set the volume controls.

I can't play or record sound from the microphone jack at the front of the laptop.

/proc/modules includes these modules:

via82cxxx_audio 19388 0
ac97_codec 12084 0 [via82cxxx_audio]
uart401 6404 0 [via82cxxx_audio]
sound 54888 0 [via82cxxx_audio uart401]
soundcore 3588 4 [via82cxxx_audio sound]

/etc/modules.conf has:

above snd-via82xx snd-pcm-oss
alias sound-slot-0 via82cxxx_audio

lspci -v says:

00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio Controller (rev 21)
Subsystem: Compaq Computer Corporation Soundmax integrated digital audio
Flags: medium devsel, IRQ 11
I/O ports at 1000 [size=256]
I/O ports at 1834 [size=4]
I/O ports at 1830 [size=4]
Capabilities: [c0] Power Management version 2


Turning up the "Mic" volume on aumix doesn't play the sound going to the mic input,
and recording from /dev/sound/dsp just gives a silent file (no error messages).

Any suggestions?
 
Old 11-08-2004, 09:48 PM   #2
Gary987
Member
 
Registered: Oct 2003
Distribution: Gentoo, Mint, Ubuntu, Vector
Posts: 149

Rep: Reputation: 15
You should use

alsamixer as you seem to have alsa modules loaded in...

make sure that your mic is not muted..

note the MM on the top of the slider...

PS> you may have to scroll to the left a bit to find your mic setting.,..


Cheers,

Gary
 
Old 11-09-2004, 10:03 AM   #3
mward
LQ Newbie
 
Registered: Nov 2004
Distribution: Mandrake
Posts: 4

Original Poster
Rep: Reputation: 0
alsamixer says:

alsamixer: function snd_ctl_open failed for default: No such file or directory

By the way, I should probably have pointed out that I am running kernel 2.4.27. But I tried rebooting to the old kernel (2.4.22-10mdk which comes with Mandrake 9.2) and got the same result.

I have just discovered that there is no sound coming out of the headphone socket on the front of the laptop (only the internal speakers). So we may be looking at a hardware problem here
 
Old 11-12-2004, 12:17 AM   #4
Lenard Spencer
Member
 
Registered: Sep 2004
Location: Florida
Distribution: Slackware, Linux from Scratch
Posts: 173

Rep: Reputation: 20
Is your system capable of 6-channel (5.1) sound? If so, you will need to run Kmix, and in the "Advanced" section, see if you have "mic as Center/LFE" enabled. If so, disable it, that shoud get you your mic input back. Also, if you need line-in, "line-in as surround" toggles that.

Hope this is what you're looking for....
 
Old 11-12-2004, 06:15 AM   #5
mward
LQ Newbie
 
Registered: Nov 2004
Distribution: Mandrake
Posts: 4

Original Poster
Rep: Reputation: 0
Its definitely not 5.1 channel sound: there isn't even a n "Advanced" section in Kmix!
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Capturing the input from microphone... nutnut Linux - General 2 07-28-2005 02:49 AM
using the microphone input to sample signals lorenzaccio Linux - Newbie 0 01-19-2005 04:56 PM
No microphone input with Ensoniq es1371 rowland15 Linux - Hardware 4 08-30-2004 03:43 PM
Please introduce tools to build application that can get input from Microphone amarin Linux - Software 2 08-10-2004 03:40 PM
Microphone input w/ Knoppix and TeamSpeak2 punk Linux - Hardware 0 03-24-2004 11:21 PM


All times are GMT -5. The time now is 02:33 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration